Controlling Text Input

( ccc )

( -- ) 

Begin a comment. 

\ rest-of-line

( -- ) 

Skip the rest of the line. 

ascii ccc

( -- char ) 

Get numerical value of first ASCII character of next word. 

key

( -- char ) 

Read a character from the assigned input device's keyboard. 

key?

( -- flag ) 

True if a key has been typed on the input device's keyboard.