SGN(expression)

Returns the sign of a numeric expression as follows:

• -1 if the number is negative
• 0 if the number is zero
• 1 if the number is positive

The returned value type is byte.

REM Print sign of different numbers
PRINT "Sign of -5 is "; SGN(-5) ' Prints -1
PRINT "Sign of 0 is "; SGN(0) ' Prints 0
PRINT "Sign of 3.14 is "; SGN(3.14) ' Prints 1

• This function is 100% Sinclair BASIC Compatible
• If the argument is an unsigned value, the result will always be either 0 or 1
• Using SGN with string expressions will result in a compile-time error

• ABS