C/math.h/hypot

    
//Declaration: float hypotf(float side1, float side2); 
               double hypot(double side1, double side2); 
               long double hypotl(long double side1, long double side2);  
 
    
  
 
  #include <math.h>
  #include <stdio.h>
  int main(void)
  {
     int e;
     double f;
     f = hypotf(3, 4);
     printf("%f", f);
 
  }
         
        /*5.000000*/