SGN SiGN
Function
SGN indicates whether a number is positive, negative or zero.
How to use SGN
SGN is followed by a numeric value, for example
50 LET x=SGN y
An expression must be enclosed in brackets. SGN then returns 1 if the value of the argument (y above) is positive, -1 if it is negative and 0 if it is zero.
Format
- SGN num-const
- SGN num-var
- SGN (num-expr)
See also