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The function returns the first element (NUMBER ) in the number list l, or  null if l is an empty list.

Syntax
first(number list l) #Output: Number
Examples
Parser expressionDescription
first([3, 2, 1, 0])

The function returns the NUMBER 3, which is the first element of the number list l.

Additional information

Parameters used in this function

ParameterInput (data type)Description
<parameter>

DATA TYPE

Parameter description.
Output

The function returns a NUMBER