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Short description	Returns the first element in the number, text, or issue list l, or `null` if l is an empty list.
Output
Available since

Supported list types

This function returns the first element in the number list l, or null if l is an empty list.

first(number list l) #Output: Number

Parser expression

Description

first([3, 2, 1, 0])

This example returns the number 3, which is the first element of the number list l.

Parameters used in this function

Parameter	Input (data type)	Description
`xxx`		Parameter description.

This function returns a

This function returns the first element in the text list l, or null if l is an empty list.

first(string list l) #Output: Text

Parser expression Description

first(["blue", "red", "green"])

This example returns the text: "blue", which is the first element of the text list l.

Parameters used in this function

Parameter	Input (data type)	Description
`xxx`		Parameter description.

This function returns a

The function returns an issue list with the first element in issue list l, or an empty list if l is an empty list.

first(issue list l) #Output: Issue list

Parameters used in this function

Parameter	Input (data type)	Description
`xxx`		Parameter description.

This function returns an