GWBASIC User's Manual

GW-BASIC User's Guide
SGN Function
Purpose:
To return the sign of x.
Syntax:
SGN(x)
Comments:
x is any numeric expression.
If x is positive, SGN(x) returns 1.
If x is 0, SGN(x) returns 0.
If x is negative, SGN(x) returns -1.
This statement is similar to, but not the same as SIN(x), which returns a trigonometric function
in radians, rather than in ones and zeros.
Examples:
10 INPUT "Enter value", x
20 ON SGN(X)+2 GOTO 100, 200, 300
GW-BASIC branches to 100 if X is negative, 200 if X is 0, and 300 if X is positive.
file:///C|/Documents%20and%20Settings/Lorenzo/Desktop/GW%20Basic/SGN.html28/03/2004 21.29.46