C/math.h/ilogb

ilogb: returns the exponent of num

<source lang="cpp">

//Declaration: int ilogbf(float num);

              int ilogb(double num); 
              int ilogbl(long double num);  

   
 
 #include <math.h>
 #include <stdio.h>
 int main(void)
 {
    int e;
    e = ilogbl(4);

    printf("%d", e);

 }
        
       /*2*/ 
          
      </source>