log10()

The log10() function returns the base-10 logarithm of the argument.

Syntax

log10(x)

If the x parameter is negative (less than zero), then a domain error will occur. If x is equal to zero, a pole error may occur where the result has reached the point of infinity and cannot be expressly returned.

Example

The following example uses the log10() function to find the base-10 log of 5:

#include <iostream>
#include <cmath>
using namespace std;

int main() {
  double x = 5;
  double result;
  result = log10(x);
  cout << "The log to the base of 10 of " << x << " is " << result << "\n";
  // Output: The log of 5 is 0.69897
}

Codebyte Example

The following example is runnable and returns the base-10 log of 10:

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