guess-number ( -- n/f )

Vocabulary

numbers-game

Inputs

None

Outputs

n/f

an object

Definition

USING: io kernel math.parser ;

IN: numbers-game

: guess-number ( -- n/f )
    "Enter your guess: " write flush readln [
        string>number dup
        [ ] [
            drop "Please enter a number." print
            flush guess-number
        ] if
    ] [ f ] if* ;