C Tutorial/math.h/copysign

copysign

Item Value Header file math.h Declaration float copysignf(float val, float signval);double copysign(double val, double signval);long double copysignl(long double val, long double signval); Function gives val the same sign as signval, and return the result.

<source lang="cpp">#include <math.h>

 #include <stdio.h>
 int main(void)
 {
   printf("%f", copysignf(1.0, -2.0));
  
 }</source>