Apex Developer Guide

Apex Developer Guide
Release Notes
Getting Started with Apex
Writing Apex
Data Types and Variables
Control Flow Statements
Conditional (If-Else) Statements
Switch Statements
Loops
Do-While Loops
While Loops
For Loops
Traditional For Loops
List or Set Iteration for Loops
Iterating Collections
Classes, Objects, and Interfaces
Working with Data in Apex
Document Your Apex Code
Running Apex
Debugging, Testing, and Deploying Apex
Apex Reference
Appendices
PDF

List or Set Iteration for Loops

The list or set iteration for loop iterates over all the elements in a list or set. Its syntax is:
where variable must be of the same primitive or sObject type as list_or_set.

When executing this type of for loop, the Apex runtime engine assigns variable to each element in list_or_set, and runs the code_block for each value.

For example, the following code outputs the numbers 1 - 10 to the debug log: