The Sgn internal function returns a value which identifies whether a numeric value is negative, positive or zero. The returned values are as follows:
-1 if X is negative
0 if X is zero
1 if X is positve
00010 print SGN(-3) 00020 print SGN(0) 00030 print SGN(6.5)
-1 0 1
SGN is affected by the value of the BRConfig.sys RD specification. For instance, if RD were set to 6 (the default), the value returned by the following SGN function would be 1 (positive). But if RD were set to 3, the returned value would be 0.