Function - Function Summary

Summary:

Defines a user function with local words.

Usage:

function spec vars body

Arguments:

spec - Optional help info followed by arg words (and optional type and string) (must be: block)

vars - List of words that are local to the function (must be: block)

body - The body block of the function (must be: block)

Description:

FUNCTION is identical to FUNC but includes a block in which you can name words considered LOCAL to the function.

average: function [block] [total] [
    total: 0
    foreach number block [total: number + total]
    total / (length? block)
]
print average [1 10 12.34]
7.78

Related:

does - A shortcut to define a function that has no arguments or locals. exit - Exits a function, returning no value. func - Defines a user function with given spec and body. function? - Returns TRUE for function values. has - A shortcut to define a function that has local variables but no arguments. make - Constructs and returns a new value. return - Returns a value from a function. use - Defines words local to a block.