log10 -- Calculate Base 10 Logarithm

Format

#include <math.h>
double log10(double x);

Language Level: ANSI, POSIX, XPG4
log10 calculates the base 10 logarithm of x.

Return Value
log10 returns the computed value. If x is negative, log10 sets errno to EDOM and may return the value -HUGE_VAL. If x is zero, log10 returns the value -HUGE_VAL, and may set errno to ERANGE.

Example
This example calculates the base 10 logarithm of 1000.0.

#include <math.h>
#include <stdio.h>
int main(void)
{
   double x = 1000.0,y;
   y = log10(x);
   printf("The base 10 logarithm of %lf is %lf\n", x, y);
   return 0;
   /******************************************************
      The output should be:
      The base 10 logarithm of 1000.000000 is 3.000000
   ******************************************************/
}


exp -- Calculate Exponential Function
log -- Calculate Natural Logarithm
pow -- Compute Power
<math.h>