Returns the logical inverse of an expression.
NOT(expression)
expression is any valid DataBasic expression or any string, substring, or value; expressed as a variable name, a value, or a string enclosed in quotes.
NOT returns a value of true (1) if expression evaluates to 0 and returns a value of false (0) if expression evaluates to a nonzero quantity.
expression must evaluate to a numeric quantity or a numeric string.
X = NOT(X="")
Assigns the value 1 to variable X, because NOT(X="") is a true statement.
A = 1 B = 5 PRINT NOT(A AND B)
Prints 0 (zero), because the logical inverse of A AND B evaluates to false.
IF NOT(X1) THEN STOP
Terminates program if current value of variable X1 is 0.
PRINT NOT(M)
Prints a value of 1 if the current value of variable M is 0 or a null string; otherwise, prints a zero. If M is nonnumeric, an error message is returned.
PRINT NOT(5 LT 1)
Prints a value of 1.