Apex Developer Guide

Apex Developer Guide
Release Notes
Getting Started with Apex
Writing Apex
Data Types and Variables
Data Types
Primitive Data Types
Collections
Enums
Variables
Constants
Expressions and Operators
Expressions
Expression Operators
Safe Navigation Operator
Null Coalescing Operator
Operator Precedence
Comments
Assignment Statements
Rules of Conversion
Control Flow Statements
Classes, Objects, and Interfaces
Working with Data in Apex
Document Your Apex Code
Running Apex
Debugging, Testing, and Deploying Apex
Apex Reference
Appendices
PDF

Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

Comments

Both single and multiline comments are supported in Apex code.

We recommend using the standardized ApexDoc comment format to increase code readability, collaboration, and long-term maintainability. For the full specifications, see Document Your Apex Code.

Tip

  • To create a single line comment, use //. All characters on the same line to the right of the // are ignored by the parser. For example:
    1Integer i = 1; // This comment is ignored by the parser
  • To create a multiline comment, use /* and */ to demarcate the beginning and end of the comment block. For example:
    1Integer i = 1; /* This comment can wrap over multiple
2                  lines without getting interpreted by the 
3                  parser. */