Until - Function Summary

Summary:

Evaluates a block until it is TRUE. 

Usage:

until block

Arguments:

block - The block argument. (must be: block) 

Description:

Evaluates a block until the block returns a TRUE value (that is, the last expression in the block is TRUE). 

    str: "string"

    until [

        print str

        tail? str: next str

    ]

    string

    tring

    ring

    ing

    ng

    g

Related:

for - Repeats a block over a range of values.

repeat - Evaluates a block a number of times or over a series.

while - While a condition block is TRUE, evaluates another block.