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ad [a: list] [b: any] -> list

Adds b to the end of a. Works in-place, also returns for legacy support **DEPRECATION NOTICE: **The return value will be removed due to redundancy in a future version of the interpreter

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rm [a: list]

Removes the last item of a

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pt [a: list] [b: int] [c: any]

**Primary Operator: **Sets index b of list a to value c. Must be in-place.

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gt [a: list] [b: int] -> any

Returns the item at index b of list a

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girth [a: list, str] -> int

Returns the length of a