# INPUTNULL

Updated: 10/19/2021, 9:29:48 PM
Created: 10/19/2021, 9:29:48 PM
Last Updated By: Kevin Munoz
Read Time: 1 minute(s)

Tags: keyboard input

# Description

The INPUTNULL statement allows the definition of a character that will allow a null input to be seen by the [email protected] statement. It takes the general form:

INPUTNULL expression
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Where expression should evaluate to a single character. Subsequently, any [email protected] statement that sees only this character input before the new-line sequence will NULL the variable in which input is being stored.

If expression evaluates to the empty string '' then the default character of '_' is used to define a NULL input sequence.

# Note

The INPUT statement does not default to accepting the '_' character as a NULL input.

An example of use is as:

INPUTNULL "&"
INPUT @(10,10):Answer,1
IF Answer = "" THEN
    CRT "A NULL input was received"
END
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