Futurebasic/Language/Reference/sgn
SGN
[edit | edit source]Syntax
[edit | edit source]signOfExpr = SGN(expr)
Description
[edit | edit source]Use this function to determine the "sign" of expr
. SGN
returns:
- 1 if expr is positive;
- 0 if expr is zero;
- -1 if expr is negative.
Example
[edit | edit source]This loop counts up if first, and counts down if last: <code><b>FOR</b> x = first <b>TO</b> last <b>STEP</b> <b>SGN</b>(last-first)<br> <b> PRINT</b> x<br> <b>NEXT</b></code>
See Also
[edit | edit source]FOR; ABS