Episode 1 - Introduction to Apex (Part 1)

129

Episode 1 – Introduction to Apex (Part 1)

Posted on January 26, 2020 Posted By: Jigar Shah Categories: Apex, Apex Hours for Students, Salesforce Developer Training

So, you have decided to commence your journey as a Salesforce developer and put your career in the fast-paced lane. Join us as you embark on this wonderful journey to become a champion Salesforce developer. In this module we will introduce the Salesforce platform and acquaint the attendees with Apex.

Agenda

Declarative Vs Programmatic Approach of Development
Datatypes in Apex
Operators in Apex
System.Debug()
Familiarizing to Dev Tools – VS Code, Anonymous Block
Q & A

Most importantly don’t break a leg if you are overwhelmed with the pace of the live sessions. All Apex Hours for Student sessions will be recorded and will be available on our YouTube channel. Please Subscribe our YouTube Channel.

Here is Keynote from our session

Why code?

Customized applications
Tailored organization processes
Collaboration with external systems
Custom logic
Complex validation

What is Apex?

Strongly typed, object-oriented programming language that allows developers to execute flow & transaction control statements on Salesforce servers in conjunction with calls to the API.

Salesforce Application Anatomy

Data Types in Apex

Data Type	Description	Sample Value
Blob (Binary Large Object)	Binary data stored as a single object. You can convert this data type to String or from String using the toString() and valueOf() methods, respectively.	*VGhpcyBEb2N1bWVudCBjb250YWlucyBzYW1wbGUgdGV4dCBmb3IgdGhlIFZpc3VhbGZvcmNlIA0KRG9jdW1l*
Boolean	Logical value	*True, False, null*
Date	Indicates a particular day. Unlike Datetime values, Date values contain no information about time.	*2020-02-10*
Datetime	A value that indicates a particular day and time, such as a timestamp.	*2020-02-10 07:29:09*
Time	A value that indicates a particular time.	*22:40:36.003Z*
Decimal	A number that includes a decimal point. Decimal is an arbitrary precision number. Currency fields are automatically assigned the type Decimal.	*27.0*

Variables in Apex

Variables are in-memory containers that can hold data belonging to a specific data-types during processing and can be reused based on their scope.

Integer inValue = 27;
System.debug(‘ID :’ +inValue);

Demo 2: Using Variables & Operators in Apex

String o = ‘Hello World’; //String
System.debug(‘Blob: ‘ + Blob.valueOf(o)); //Blob

Boolean isActive = true;
System.debug(‘Boolean: ‘ + isActive); //Boolean
System.debug(‘Date: ‘ + Date.newInstance(2020, 01, 18)); //Date

Datetime currDateTime = Datetime.now();
System.debug(‘Date: ‘ + currDateTime); //DateTime
System.debug(‘Time: ‘ + Time.newInstance(22, 40, 36, 03)); //Time

Decimal decValue = 27.01;
System.debug(‘Decimal: ‘ + decValue); //Decimal

Id recordId = [Select Id From Account Limit 1][0].Id;
System.debug(‘ID: ‘ + recordId); //ID

Integer intValue = 27;
System.debug(‘Integer: ‘ + intValue); //Integer

Long longValue = 2147483648L;
System.debug(‘Long: ‘ + longValue); //Long

Object objValue = o;
System.debug(‘Object: ‘ + objValue); //Object

Iterating Collections in Apex

5 Types of Procedural Loops in Apex

Do {Code Block} While (Boolean Exit Condition)
While (Boolean Exit Condition)
For
- For (Initialization; Boolean Exit Condition; Increment) {Code Block}
- For (Variable : Array or Set) {Code Block}
- For (Variable : [Inline SOQL Query]) {Code Block}

Conditional Statements in A

If Else…
Switch Statements
Ternary Operators

Collection in Apex

We have all below collection option in apex. Please check this post to learn more about collection in Apex.

List
Set
Map

Demo 3 – Using Collections in Apex

List<Integer> listOfNumbers = new List <Integer> ();
listOfNumbers.add(1);
listOfNumbers.add(2);
listOfNumbers.add(3);
listOfNumbers.add(3);
System.debug(‘listOfNumbers: ‘ + listOfNumbers);

Set<Integer> setOfNumbers = new Set<Integer>();
setOfNumbers.add(3);
setOfNumbers.add(2);
setOfNumbers.add(2);
setOfNumbers.add(1);
System.debug(‘setOfNumbers: ‘ + setOfNumbers);

Map <Integer,String> mapOfIntegerString = new Map <Integer,String> ();
mapOfIntegerString.put(1, ‘one’);
mapOfIntegerString.put(2, ‘two’);
mapOfIntegerString.put(3, ‘three’);
mapOfIntegerString.put(3, ‘four’);
System.debug(‘mapOfIntegerString: ‘ + mapOfIntegerString);
System.debug(‘Value at 3: ‘ + mapOfIntegerString.get(3));

Demo 4 – Using Loops in Apex

List<integer> listOfNumbers = new List <integer> ();
Integer maxListSize = 5;
for(Integer i = 1; i <= maxListSize; i++){
listOfNumbers.add(i);
}
System.debug(‘listOfNumbers: ‘ + listOfNumbers);

When should I use Apex?

Recording

Here is link of recording

Episode 1 will be presented by Jigar Shah on Feb 10, 2020 at 6 PM Indian Standard Time.

Further Learning

Apex Hours TrailMixes

Assignment

Complete below assignment to win $1000 Salesforce Voucher. Click here for rule.

Write an Apex program to store all the numbers in a List starting from 1 until 20. Only numbers stored at even positions in the List should be added to get their sum which should be output to the Debug Log.

(Hint: Use a while loop and if else along with System. debug()

Don’t forget to register for our next session. Check this post for all other session details.

Please note that we have limit of 500 attendees that can join the online sessions. However, recording will be posted on our YouTube channel. Make sure to subscribe our YouTube channel to get notification for video upload.

So, learn at your pace and free will and ace your journey to Salesforce!

Thanks,

Jigar Shah

Anonymous Block, Apex, Collection, DataType, Developer Console, Operators, Salesforce Developer Training, What is Apex

Comments(129)

Reply
Darshan says:
January 26, 2020 at 6:18 pm
Is the link to join the live session if so I am unable to see it if you could share would be wonderful.
- Reply
  Amit Chaudhary says:
  January 26, 2020 at 7:20 pm
  Say Connected we will share the registration link soon
- Reply
  Jessica says:
  February 10, 2020 at 11:45 pm
  I have completed Assignment `
Reply
Lucien YSR OULA ☁️ says:
January 30, 2020 at 11:30 am
Ok 👌look forward to 👍
Reply
Rama says:
February 5, 2020 at 5:58 am
please share the link
Reply
Alisha says:
February 5, 2020 at 1:04 pm
Link to join the session
- Reply
  Amit Chaudhary says:
  February 6, 2020 at 3:43 am
  Click on registration link in the post
Reply
Pani says:
February 10, 2020 at 11:50 am
Are you available on Udemy?
- Reply
  Amit Chaudhary says:
  February 10, 2020 at 6:45 pm
  This is totally free, We will upload on YouTube.
  - Reply
    Seetharaman says:
    February 11, 2020 at 10:49 am
    Thanks for your videos. Waiting for upcoming videos.
Reply
Dhanalakshmi Vellachamy says:
February 10, 2020 at 2:04 pm
Does this entire Developer Program cover the Salesforce Developer Certification modules Or Does it help in Developer Certification?
Reply
Anuj Sahu says:
February 10, 2020 at 2:36 pm
ApexHours Completed my first Assignment of Apex. Looking forward to explore more
Reply
Amit Pande says:
February 10, 2020 at 2:53 pm
Hello Jigar/Apex Team – Thanks for a good starting session for Apex development today. Appreciate your team efforts on the same. I am aware it will take some time and efforts to upload daily recording on youtube and this site, however could you please upload daily ppt used and trailhead links immediately after each session so that we can refer them before next day’s session. Also seen that ppt is not uploaded for last year’s admin sessions and trailhead links for also few. Could you please check that once and upload ppt and trailhead links for all admin session? It will be very useful. – Amit
- Reply
  Amit Chaudhary says:
  February 10, 2020 at 6:44 pm
  Uploaded all content and Demo code as well
  - Reply
    cBooM says:
    March 10, 2020 at 10:47 pm
    where ? 🙁
Reply
Dhanalakshmi Vellachamy says:
February 10, 2020 at 3:10 pm
Assignment Answer :

Integer listSize = 20;
Integer sum=0;
for (Integer i =1; i<=listSize; i++)
{
testList.add(i);
}
Integer count = 0;
while(count < 20 )
{
if(math.mod(count, 2) == 0)
{
sum = sum + testList[count];
}
count++;
}
System.debug('Total Sum is ' +sum);

// Total Sum is 100
- Reply
  Aswini says:
  December 2, 2020 at 2:08 pm
  integer sum=0;
  list listnumber=new list();
  integer i=1;
  while(i<=20)
  {
  listnumber.add(i);
  i++;
  }
  System.debug('listnumber 1 to 20:'+listnumber);
  for(integer i=1;i<listnumber.size();i++)
  
  {
  if(Math.mod(listnumber[i], 2)==0)
  {
  sum=sum+listnumber[i];
  System.debug('totalsum value:'+sum);
  }
  
  }
  System.debug('final totalsum::'+sum);
  
  out put:istnumber 1 to 20:1,2,3,4,5,6,7,8,9,10……
  inal totalsum::110
  - Reply
    Arnab Saha says:
    May 14, 2021 at 11:41 am
    integer totalssum=0;
    list listofnumbers=new list();
    for( integer i=1; i<=20 ; i++)
    {
    listofnumbers.add(i);
    }
    System.debug('listnumbers 1 to 20:'+listofnumbers);
    for(integer i=1;i<listofnumbers.size();i++)
    
    {
    if(Math.mod(listofnumbers[i], 2)==0)
    {
    totalssum=totalssum+listofnumbers[i];
    System.debug('totalsum value:'+totalssum);
    }
    
    }
    System.debug('final totalsum::'+totalssum);
    - Reply
      Arnab Saha says:
      May 14, 2021 at 11:42 am
      listofnumbers ko integer define karo
      - Amit Chaudhary says:
        May 19, 2021 at 10:29 am
        Thanks for helping
  - Reply
    ritanshu kumar says:
    June 2, 2021 at 5:07 am
    totalsum::210
Reply
Asmita says:
February 10, 2020 at 3:28 pm
Completed the assignment
Reply
Asmita says:
February 10, 2020 at 3:30 pm
Completed the assignment for day 1
Reply
Archit Dutt Sharma says:
February 10, 2020 at 3:36 pm
Completed the first assignment
Reply
Isaac Arcos Huicochea says:
February 10, 2020 at 4:25 pm
Completed the first Assignment
Reply
Venkatesh says:
February 10, 2020 at 6:46 pm
Many thanks for arranging sessions even in busy schedules. Really appreciate your team efforts.
I have completed first assignment.
Reply
Venkatesh says:
February 10, 2020 at 6:50 pm
Many thanks for arranging sessions even in your busy schedules. Really appreciate your team efforts.
I have completed first assignment given today.
Reply
Ankit Desai says:
February 10, 2020 at 7:59 pm
Completed Assignment for Day 1
Reply
Ankit Desai says:
February 10, 2020 at 8:19 pm
Competed Assignment for day 1
Reply
Dave says:
February 10, 2020 at 8:22 pm
I realize that it takes time to accomplish this, but the sooner you could post the video to Youtube the better. For me, it is 4:30am for the sessions. I made it today and fell asleep during it. It had nothing to do with you guys! It was just too early in the morning to be awake. I’d love to be able to schedule watching the video the same day it was done and do the work.

Thanks for being awesone!
- Reply
  Amit Chaudhary says:
  February 10, 2020 at 8:25 pm
  We will upload all recording by 6 MARCH
  - Reply
    Sadaf Khan says:
    February 11, 2020 at 2:04 am
    Thanks
    
    Assignment Complete-Day 1
Reply
Natalya says:
February 10, 2020 at 9:29 pm
Wohoo, my assignment 1 is complete 🙂 Thank you so much for running these sessions, guys!
Reply
Ajay Gupta says:
February 11, 2020 at 1:05 am
Completed the assignment of Day 1.
Reply
Sadaf Khan says:
February 11, 2020 at 1:28 am
Day 1 -Assignment Complete

Thank you for hosting these sessions.
Reply
Bhargavi says:
February 11, 2020 at 1:30 am
My assignment for Day 1 is complete
Reply
Sadaf Khan says:
February 11, 2020 at 1:46 am
Day 1- Assignment Completed.

Thank you for hosting these session.
Reply
Sadaf Khan says:
February 11, 2020 at 2:03 am
Assignment Complete
Reply
Vikas Sharma says:
February 11, 2020 at 3:13 am
Thank you Jigar/Amit for this amazing Initiative.
Completed my assignment for Day#1
Reply
Shaik says:
February 11, 2020 at 3:38 am
Done with assignment. Thanks
Reply
Quang Du says:
February 11, 2020 at 4:01 am
Assignment 1 completed. Thank you deeply for this learning opportunity.
Reply
Quang Du says:
February 11, 2020 at 4:03 am
Assignment 1 completed. Thank you!
Reply
Quang says:
February 11, 2020 at 4:10 am
Assignment 1 completed. Thank you!
Reply
Latha Vemula says:
February 11, 2020 at 4:24 am
Thank you guys so much for motivating other to learn with your good work. This is really exciting and definitely a staring point for people like me to achieve goals to become a salesforce developer. Assignment is completed for day1 #Apexhours session. Looking forward to learn and experience the awesomeness with in this journey.
Reply
A Belano says:
February 11, 2020 at 5:03 am
Completed Assignment for Day 1. Great first session. Excited to learn more!
Reply
A Belano says:
February 11, 2020 at 5:07 am
Completed Day 1 Assignment
Reply
A Belano says:
February 11, 2020 at 5:16 am
Assignment for Day 1 completed!
Reply
isthiyaq ahamed says:
February 11, 2020 at 5:56 am
Completed the assignment for day 1
Reply
Erick says:
February 11, 2020 at 6:07 am
Completed the assignment for day 1.
Reply
Erick says:
February 11, 2020 at 6:08 am
Completed the assignment for day 1.
Reply
Erick says:
February 11, 2020 at 6:11 am
Completed the assignment for day 1
Reply
Vandana says:
February 11, 2020 at 6:34 am
First Assignment completed
Reply
Aathirai says:
February 11, 2020 at 6:54 am
Completed Day 1 Assignment. Waiting eagerly for the next session.
Reply
Aathirai says:
February 11, 2020 at 6:57 am
Completed Day 1 Assignment.
Reply
Vanita Sangle says:
February 11, 2020 at 7:12 am
Completed assignment for session 1 ..thank you for your efforts..
Reply
Vanita Sangle says:
February 11, 2020 at 7:21 am
Completed assignment 1..thank you.
Reply
waruna says:
February 11, 2020 at 7:24 am
Completed the assignment
Reply
Diksha Chhabra says:
February 11, 2020 at 7:58 am
Thannks for the valuable session.
Introduction to Apex Part 1 : Assignment completed
Reply
Rishab Goyal says:
February 11, 2020 at 8:00 am
Completed Assignment 1
Reply
Surabhi says:
February 11, 2020 at 8:28 am
completed
Reply
Surabhi says:
February 11, 2020 at 9:03 am
COmpleted assignment 1 .:)
Reply
Akhil Kulshrestha says:
February 11, 2020 at 9:14 am
the assignment is complete
Reply
Prakash says:
February 11, 2020 at 9:15 am
successfully completed assignment1 🙂
Reply
surabhi says:
February 11, 2020 at 9:45 am
List mylist=new list();

Integer sum=0;
for (Integer i =1; i<=20; i++)
{
mylist.add(i);
//system.debug(mylist);
}
Integer j = 0;
while(j < 20 )
{
integer check=math.mod(j, 2);
if(check == 0)
{
sum = sum + mylist[j];
}
j++;
}
System.debug('Sum is ' +sum);
Reply
Deepak Sah says:
February 11, 2020 at 9:54 am
Thank you so much for wonderful session.

Assignment is completed.
Reply
Deepak Sah says:
February 11, 2020 at 10:21 am
Competed Assignment for day 1
Reply
Marishell Cruz says:
February 11, 2020 at 11:20 am
Completed first assignment for day 1
Reply
Nishith Agrawal says:
February 11, 2020 at 12:03 pm
Completed assignment for day1.
Reply
Praveen says:
February 11, 2020 at 12:11 pm
ApexHours is the best platform that i have seen so far. Thanks for helping people to code. Its is good initiative by the great people working on Salesforce Platform to help people code.

Thanks for all you hard work to keep this running!! 🙂

I have completed Assignment 1.
Reply
Praveen Venkata says:
February 11, 2020 at 12:23 pm
It’s a great platform to interact with all great leaders who initiated this program to help people learn code.

Completed Assignment 1.
Reply
Preeti says:
February 11, 2020 at 2:01 pm
Hi ..Thanks for the really useful and knowledgeable session..Completed Assignment for Day1.
Reply
Preeti says:
February 11, 2020 at 2:02 pm
Thanks for the wonderful session.Completed Assignment 1 of Day 1
Reply
Paranthaman K says:
February 11, 2020 at 2:10 pm
Assignment Completed..
Reply
Paranthaman K says:
February 11, 2020 at 2:11 pm
Assignment 1 Completed..
Reply
Quang says:
February 11, 2020 at 5:21 pm
Assignment 1 completed.
Reply
Bhavin says:
February 12, 2020 at 12:38 am
Assignment day#1
—————————-

Integer totalsum=0;
List numbers = new List();
for (Integer i = 1; i <= 20; i ++)
{
numbers.add(i);
}

//System.debug('listofnumbers'+ numbers);

for (Integer i=1;i<numbers.size();i++)
{
if (Math.mod(numbers[i],2)==0)
{
totalsum= totalsum + numbers[i];

}
}

System.debug('total sum is'+totalsum);
Reply
Bhavin says:
February 12, 2020 at 12:40 am
Assignment#1
————————
Integer totalsum=0;
List numbers = new List();
for (Integer i = 1; i <= 20; i ++)
{
numbers.add(i);
}

//System.debug('listofnumbers'+ numbers);

for (Integer i=1;i<numbers.size();i++)
{
if (Math.mod(numbers[i],2)==0)
{
totalsum= totalsum + numbers[i];

}
}

System.debug('total sum is'+totalsum);
Reply
Gugulothu Anil says:
February 12, 2020 at 5:05 am
assignment is completed
Reply
Arjinder Kaur says:
February 12, 2020 at 7:29 am
Assignment done
Reply
Arjinder Kaur says:
February 12, 2020 at 7:31 am
Day1 Assignment done
Reply
Modi says:
February 12, 2020 at 10:52 am
Hello,
Assignment Day 1 completed.
Integer Totalsum = 0;
List listOfNumbers = New List ();
For(Integer i=0; i<20; i++){
listOfNumbers.add(i+1);
}
System.debug('listOfNumbers:' +listOfNumbers);
For(Integer j=0; j<20; j++){
if(Math.mod(j,2)==0){
Totalsum = Totalsum +listOfNumbers[j];
System.debug('Totalsum value:' +Totalsum);
}
}
System.debug('Final summation:' +Totalsum);
Reply
Brisilda says:
February 12, 2020 at 12:01 pm
Day 1 Assignment is completed!
Reply
balaji manikandan says:
February 13, 2020 at 6:30 am
Day 1 Assignment is completed.
Reply
balaji manikandan says:
February 13, 2020 at 8:10 am
Assignment 1 completed
Reply
Keerthana Ramesh says:
February 13, 2020 at 8:27 am
Completed Day 1 Assignment
Reply
Michael Wind says:
February 13, 2020 at 1:20 pm
complete Assigment Day 1
Reply
Chetan Sharma says:
February 13, 2020 at 7:31 pm
Completed Day 1 assignment
Reply
Rana Khan says:
February 13, 2020 at 7:53 pm
Completed the Assignment
Reply
SaiSagar says:
February 14, 2020 at 11:51 am
Day 1 Assignment Done
Thanks
Reply
Sai Sagar says:
February 14, 2020 at 11:52 am
Day 1 Assignment Done
Thanks
Reply
Raman Chopra says:
February 15, 2020 at 5:26 am
Day 1 Assignment is completed.
Reply
Raman Chopra says:
February 15, 2020 at 5:35 am
Day1 Assignment Completed
Reply
Otieno says:
February 15, 2020 at 7:07 am
Thanks for hosting this awesome session.
Really looking forward my SalesForce Dev Career.
Day 1- Assignment Completed.
Reply
Otieno says:
February 15, 2020 at 11:35 am
Assignment 1: Completed.
Thanks for the upskilling opportunity.
Reply
Adnan says:
February 15, 2020 at 3:56 pm
Day 1 Assignment Complete
Reply
Titli Banerjee says:
February 16, 2020 at 3:53 pm
Assignment is complete
Reply
Raman Chopra says:
February 16, 2020 at 4:01 pm
#ApexHoursDev @ApexHours
Day1 Assignment Completed
Reply
crystal says:
February 17, 2020 at 1:43 am
Integer Totalsum = 0;
List listOfNumbers = New List ();
For(Integer i=0; i<20; i++){
listOfNumbers.add(i+1);
//System.debug (listOfNumbers[i]);
}
System.debug('listOfNumbers:' +listOfNumbers);
For(Integer j=0; j<20; j++){
if(Math.mod(j+1,2)==0){
Totalsum = Totalsum +listOfNumbers[j];
//System.debug('Totalsum value:' +Totalsum);
}
}
//Final Summation: 110
System.debug('Final Summation:' +Totalsum);
Reply
crystal says:
February 17, 2020 at 1:46 am
Day1 Assignment Completed
Reply
crystal says:
February 17, 2020 at 1:52 am
Integer totalsum=0;
List numbers = new List();
for (Integer i = 1; i <= 20; i ++)
{
numbers.add(i);
}

//System.debug('listofnumbers'+ numbers);

for (Integer i=1;i<numbers.size();i++)
{
if (Math.mod(numbers[i],2)==0)
{
totalsum= totalsum + numbers[i];

}
}

System.debug('total sum is'+totalsum);
Reply
Siva Kumar Gampala says:
February 17, 2020 at 11:51 am
I am new to Salesforce ecosystem and interested in development .Luckily I got to know about this program and started my SalesforceDevelopment journey with ApexHours.Thank you for the great content and helping the community.
Reply
Imtiaz Ali says:
February 17, 2020 at 7:43 pm
Great platform and it help people to learn code. i am new to the world however, looks with your support i would be able to learn much!
Reply
Jaya Iyer says:
February 17, 2020 at 11:53 pm
Assignment 1 Complete
Reply
James Fody says:
February 18, 2020 at 3:56 pm
Assignment 1 complete
Reply
Shilpa Srikantachar says:
February 18, 2020 at 5:09 pm
DAY 1 Assignment Complete

This is a great initiative and love the great content .
Being a Salesforce Admin , trying to transition to being a Developer .Hope I get there .
Reply
Anand says:
February 26, 2020 at 5:41 am
I just went through the Apex hours DAY 1 Video. Its very usefull and I have completed the assignment 1:

Integer sumofnum = 0;
List listofn = new List();
for (Integer i=1; i<=20; i++){
listofn.add(i);
}
System.debug('listofn: '+listofn);

for (Integer i=1; i < listofn.size(); i++){
if(Math.mod(listofn[i],2) ==0){
sumofnum = sumofnum + listofn[i];
system.debug('sumofnum: ' + sumofnum);
}
}
system.debug('Finalsumofnumbers: ' + sumofnum);
Reply
Pritam Pramod Dalvi says:
February 26, 2020 at 11:39 am
Day 1 Assignment Completed.
Reply
Louis Macwan says:
February 28, 2020 at 7:27 am
Day 1 Assignment Completed.
Reply
Sonia Soni says:
March 5, 2020 at 5:47 am
Done with Day 1 assignment
Reply
ASHOK KUMAR PANIGRAHI says:
March 10, 2020 at 11:25 pm
#ApexHoursDev @ApexHours
Day1 Assignment Completed
Reply
NARESH CHANDA says:
March 12, 2020 at 4:16 am
Day 1 Assignment Completed.
Reply
Pratik Pandey says:
March 12, 2020 at 4:16 pm
Day 1 assignment completed
Reply
kushagra bhardwaj says:
April 3, 2020 at 10:24 am
Thank you so much for these sessions. It really means a lot.
completed assignment one.

I just encountered an issue when going through part one of basic loops.
Program which you have created at 1:18:43, the second loop to add the even numbers.
The loop you started was from index 1 but it should be from 0.

Correct me if i am wrong.
Reply
Ankit Desai says:
April 10, 2020 at 8:47 pm
Code for Assignment Day 1
——————————–
Integer countSize = 20;
Integer counter = 0;
Integer sum=0;
List listOfNumbers = new List ();
for (Integer i =1; i<=countSize; i++){
listOfNumbers.add(i);
}
System.debug('Size of list:' +listOfNumbers.size());
while(counter < listOfNumbers.size() ){
if(math.mod(counter, 2) == 0){
sum = sum + listOfNumbers[counter];
}
counter++;
}
System.debug('Total Sum for numbers which stored at even positions:' +sum);
- Reply
  Hurmat says:
  August 12, 2020 at 4:27 pm
  Hi Ankit,
  Integer countSize = 20;
  Integer counter = 0;
  Integer sum=0;
  List listOfNumbers = new List ();
  for (Integer i =1; i<=countSize; i++){
  listOfNumbers.add(i);
  system.debug('the list'+i);
  }
  System.debug('Size of list:' +listOfNumbers.size());
  while(counter<listOfNumbers.size() ){
  if(math.mod(listOfNumbers[counter], 2) == 0){
  sum = sum + listOfNumbers[counter];
  system.debug('the value of sum' +sum);
  }
  counter++;
  }
  
  System.debug('Total Sum for numbers which stored at even positions:' +sum);
  The sun should come as 110
Reply
Jim says:
June 6, 2020 at 9:56 pm
I realize this training has ended and I attempted the assigments, firstly for Assignment 1; Where can i find the answers to see if I am correct.
- Reply
  Amit Chaudhary says:
  June 6, 2020 at 11:35 pm
  Just check the other comment in this post only
Reply
prateek alavadi says:
July 24, 2020 at 1:03 pm
integer Sum=0;
List listOfNumbers = new List();
for(integer i=1; i<=20; i++){
listOfNumbers.add(i);
}
System.debug('The list of Numbers Are:-'+listOfNumbers);

for(integer i=0; i<20; i++){
if(math.mod(i,2)==0){
sum=sum+listOfNumbers[i];
}
}
System.debug('The addition is:-'+sum);
Reply
sirish says:
August 16, 2020 at 2:40 pm
List listOfNumbers = new List ();
Integer maxListSize = 20;
integer j=0;
for(Integer i = 1; i <= maxListSize; i++){
listOfNumbers.add(i);
j=listOfNumbers.size();
}
integer i=0;
integer k=0;
for(i=0;i<=j;i+=2)
{
k=k+i;
}
System.debug(k);
Reply
Priyanka says:
September 24, 2020 at 7:19 am
Integer sum=0;
List numList= new List();

for (Integer i=0; i<=20; i++)
{
numList.add(i);
}

system.debug('numbers added' +numList);

for(Integer count=1;count<numList.size();count++)
{
if(Math.mod(numList[count], 2)==0)
{
sum= sum + numList[count];

}

}
system.debug('numbers added in even list' +sum);

Answer is 110
Reply
Rahul Das says:
October 13, 2020 at 7:17 pm
Hi i am Rahul… I love the way you guys delivery the session. Now i am preparing for developer role. But i can see the developer playlist is not completed. Can you update the playlist with all the video.
Thank you in advance 🙂
- Reply
  Amit Chaudhary says:
  October 13, 2020 at 8:04 pm
  Here is all recording https://www.youtube.com/playlist?list=PLaGX-30v1lh1e8roeCUumUEel5ukdPubj
Reply
Nia says:
December 7, 2020 at 1:58 pm
Can you please upload the full ppt showed in videos for every session in .ppt format same as video
Reply
Sravani says:
December 31, 2020 at 1:01 am
Integer listSize = 20;
Integer sum=0;
list testList = new list();
for (Integer i =1; i<=listSize; i++)
{
testList.add(i);
}
System.debug('list' + testlist);
Integer count = 0;
while(count < 20 ){
if(math.mod(count, 2) == 0){
sum = sum + testList[count];
}
count++;
}
System.debug('Total Sum is ' +sum);

Total Sum is 100
- Reply
  Amit Chaudhary says:
  January 1, 2021 at 3:28 pm
  Keep learning
Reply
Aruna Devkar-Mulik says:
March 15, 2021 at 2:35 pm
List oddNumList=new List();
for(Integer i=1;i<=20;i++)
{
if(Math.mod(i,2)!=0)
{
oddNumList.add(i); //List will contain all odd numbers from 1 t 20
}
}
System.debug('List of Odd numbers : '+oddNumList);
Integer sum=0;
Integer count = 1;
while(count< oddNumList.size())
{
System.debug('count is :'+(count+1)+' Number at count is : '+oddNumList[count]);
/*
List index starts from 0 so to add numbers at even position we need to consider odd index
list -1,3,5,7,9,11,13,15,17,19 for us even position numbers are 3,7,11,15 & 19
*/
if(math.mod(count, 2) != 0)
{
sum = sum + oddNumList[count];
}
count++;
}
System.debug('Total Sum is ' +sum);
Reply
Waqar says:
May 24, 2021 at 2:33 am
list myEvenList = new list();
integer sum = 0;
for(integer i=1; i<=20; i++)
{
Integer reminder = math.mod(i, 2);
if(reminder == 0){
system.debug('Even: '+i);
sum = sum + i;
system.debug('Sum '+sum);
}
}
Reply
Sidhant says:
May 27, 2021 at 4:01 pm
integer totalSum=0;
List listOfNumbers = new List();
for(integer i=1; i<=20; i++){
listOfNumbers.add(i);
}
System.debug('listOfNumbers: ' + listOfNumbers);

integer i=1;
While(i < listOfNumbers.size()){
if(Math.mod(listOfNumbers[i],2)==0){
totalSum = totalSum + listOfNumbers[i];
System.debug('totalSum Value: ' + totalsum);
}

i++;
}
System.debug('Final sumation: ' + totalSum);
Reply
Dheeraj Gurbani says:
September 23, 2021 at 2:31 am
public class ApexHours1 {
public static void main(){
Integer sum = 0;
List iList = new List();
for(Integer i = 0; i < 20; i++){
iList.add(i);
if(math.mod(i, 2) == 0){
sum = sum + i;
}
}
System.debug(sum);
}
}

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Episode 1 – Introduction to Apex (Part 1)

Agenda

Why code?

What is Apex?

Salesforce Application Anatomy

Data Types in Apex

Variables in Apex

Iterating Collections in Apex

Conditional Statements in A

Collection in Apex

When should I use Apex?

Recording

Further Learning

Assignment

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