For Loops in Apex

Creating For Loops in apex is needed for many different tasks you’ll be given as a Salesforce Developer.

Here are some ways you can implement For Loops in your code:

For lists or set iteration:
Use this any time you want to loop over a set of records pulled from your Salesforce database.

Or Use this any time you are handling data from a method that returns a list or set.

Here is a real world example to help out.
Lets say you need to update all records for a custom object so they contain a new value for a custom field.
This could be needed if you want to add data to lookup fields retroactively!

In Apex Execute Anonymous you could write this and execute:

 

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