Futurebasic/Language/Reference/sgn

SGN

Syntax

signOfExpr = SGN(expr)

Description

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

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

FOR; ABS