$sum(array)

Returns the arithmetic sum of an array of numbers. It is an error if the input array contains an item which isn’t a number.

Example
$sum([5,1,3,7,4]) => 20

$max(array)

Returns the maximum number in an array of numbers. It is an error if the input array contains an item which isn’t a number.

Example
$max([5,1,3,7,4]) => 7

$min(array)

Returns the minimum number in an array of numbers. It is an error if the input array contains an item which isn’t a number.

Example
$min([5,1,3,7,4]) => 1

$average(array)

Returns the mean value of an array of numbers. It is an error if the input array contains an item which isn’t a number.

Example
$average([5,1,3,7,4]) => 4