An inner array refers to an array that is contained within another array.
Imagine a set of Russian nesting dolls, where each doll fits inside another doll. The smallest doll represents the innermost (or inner) array, while the larger dolls represent the outer arrays containing it.
Outer Array: An outer array is an array that contains other arrays as its elements.
Multidimensional Array: A multidimensional array is an array that contains arrays as its elements, forming a matrix-like structure.
Nested Arrays: Nested arrays are arrays that are placed inside other arrays, creating a hierarchical structure.
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