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Apex Complete Course / Core Syntax

Lists

Learn Lists in Apex with a construct-specific explanation, a unique example, a practical boundary, and a mastery check.

10 min read • Beginner

Lists is an atomic Apex topic inside Core Syntax. The example below uses the actual construct named by the lesson rather than a generic placeholder.

Focus on what Lists changes: the input, binding, control path, object state, collection, runtime effect, or language contract. Then alter one value and verify that the behavior changes for a reason specific to this feature.

Topic-specific example

apex-01-04-lists.cls
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List<Integer> ids = new List<Integer>{3,5,8};
System.debug(ids[1]);
Edge case / engineering note

Check the input collection shape, whether the operation mutates or returns a new value, and what happens for an empty collection.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

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