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Logb

Item Value Header filemath.h Declarationfloat logbf(float num);double logb(double num);long double logbl(long double num); Returnreturns the exponent of num as a floating-point integer value. #include <math.h>   #include <stdio.h>   int main(void)   {     double val = 1.0;     do {       printf("%f %f\n", val, logb(val));       val++;     } while (val<11.0);     return 0;   } 1.000000 0.000000 2.000000 1.000000 3.000000 1.000000 4.000000 2.000000 5.000000 2.000000 6.000000 2.000000 7.000000 2.000000 8.000000 3.000000 9.000000 3.000000 10.000000 3.000000