Specifies a null character for INPUT.
||An expression that resolves to a single character.
statement designates a character to represent the null string. If you specify this character to an INPUT
statement, it is saved to the variable as a null string (a string of length 0). This character remains as the designated null string character for the current process until you reset it by specifying INPUTNULL ""
The following example designates the ^ character to represent the null string for INPUT
INPUT @(1,23) inval
PRINT "Value =":inval