Nested Lists in APEX

Apex Datatypes
Integer | Datatype in APEX
Float Datatype in APEX
Date, Time & Boolean Datatypes in APEX
String Dataype in APEX
ID & Blob Datatypes in APEX
sObjects in Salesforce
Generic sObjects in Salesforce
Enums in APEX
Rules of Conversion
Collections in APEX
Lists in APEX
Lists Initialization in APEX
List Array Notation in APEX
Nested Lists in APEX
Sets in APEX
Sets Initialization Methods
Maps in APEX
Map Initialization Methods in APEX
Operators in APEX
2. Shorthand Operator:
Equality Operator(==):
Relational Operators(<,>,<=,>=):

Lists can be multidimensional also:

2-Dimensional:

List<List<Integer>> nestList = new List<List<Integer>>();

3-Dimensional:

List<List<List<Integer>>> nestList = new List<List<List<Integer>>>();

Note: SOQL queries also returns list of records.

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