[-1,1]? ( x -- ? )

Vocabulary

math.functions

Inputs

x

a number

Outputs

?

a boolean

Word description

Tests if x is a real number between -1 and 1, inclusive.

Definition

USING: kernel math ;

IN: math.functions

: [-1,1]? ( x -- ? ) dup complex? [ drop f ] [ abs 1 <= ] if
    ; inline