Apex Programming Language Cheatsheet

If you’re venturing into the world of Salesforce development, you’ll likely encounter Apex, a powerful and proprietary programming language designed specifically for building applications on the Salesforce platform. Whether you’re a novice exploring the Salesforce ecosystem or an experienced developer seeking a quick reference, this Apex programming language cheatsheet will prove invaluable.

1. Hello World:

System.debug('Hello, World!');

2. Variables and Types:

Integer i = 42;
String name = 'Salesforce';
Decimal pi = 3.14;
Boolean isTrue = true;

3. Functions:

public Integer add(Integer x, Integer y) {
    return x + y;

4. Conditionals:

if (condition) {
    // code
} else if (anotherCondition) {
    // code
} else {
    // code

5. Loops:

for (Integer i = 0; i < 5; i++) {
    // code

while (condition) {
    // code

6. Collections:

List<Integer> numbers = new List<Integer>{1, 2, 3, 4, 5};
Set<String> names = new Set<String>{'John', 'Jane'};
Map<String, Integer> ageMap = new Map<String, Integer>{'John' => 30, 'Jane' => 28};

7. Objects and Classes:

public class MyClass {
    public String name;
    public Integer age;

    public MyClass(String n, Integer a) {
        name = n;
        age = a;

8. Triggers:

trigger MyTrigger on Account (before insert) {
    for (Account a : Trigger.new) {
        // code

9. Exception Handling:

try {
    // code
} catch (Exception e) {
    System.debug('An error occurred: ' + e.getMessage());

10. SOQL Queries:

List<Account> accounts = [SELECT Id, Name FROM Account WHERE Industry = 'Technology' LIMIT 10];


This Apex cheatsheet covers essential syntax and constructs, offering a quick reference for Salesforce developers. As you navigate the world of Apex programming, remember to leverage Salesforce documentation and community resources for deeper insights and best practices. Keep this cheatsheet close at hand to streamline your development process and ensure you’re crafting robust applications on the Salesforce platform.


What is Apex, and how does it relate to Salesforce?

Apex is Salesforce’s proprietary programming language, designed for building applications on the Salesforce platform. It enables developers to create custom business logic and interact with Salesforce data.

Can Apex be used outside of the Salesforce environment?

No, Apex is specifically designed for Salesforce development and is tightly integrated with the Salesforce platform. It is not intended for general-purpose programming outside of Salesforce.

How is exception handling done in Apex?

Apex uses try-catch blocks for exception handling. Developers can catch and handle exceptions to ensure robust error management within their code.

What are triggers in Apex, and how are they used?

Triggers in Apex are special pieces of code that are executed before or after specific events occur, such as record insertion, update, or deletion. They are commonly used to implement custom logic in response to database events.

Is there a limit to the number of SOQL queries I can perform in Apex?

Yes, Salesforce imposes limits on the number of SOQL queries that can be executed. Bulkifying your code and optimizing queries are essential practices to stay within these limits and ensure efficient performance.