# C log10 Function

The C log10 function is one of the C Math Functions used to calculate the logarithmic value of a number with base 10. The syntax of the C math log10 function is

`double log10(double number);`

## C log10 Function Example

The math log10 Function allows you to find the logarithmic value of base 10. This program will find the log10 value and display the output.

```#include <stdio.h>
#include <math.h>

int main()
{
printf("\n The Logarithmic Value of 0 base 10      = %.4f ", log10(0));
printf("\n The Logarithmic Value of 1 base 10      = %.4f ", log10(1));

printf("\n The Logarithmic Value of 15 base 10     = %.4f ", log10(15));
printf("\n The Logarithmic Value of 29.3 base 10   = %.4f ", log10(29.3));

printf("\n The Logarithmic Value of -6.32 base 10  = %.4f ", log10(-6.32));
printf("\n The Logarithmic Value of -14.4 base 10  = %.4f ", log10(-14.4));

return 0;
}```

## log10 Example 2

In this C Programming example, we allow users to enter their own values. Next, the program uses the log10 function to find the logarithmic value of the user-given number with base 10.

```#include <stdio.h>
#include <math.h>

int main()
{
float number, logValue;

printf(" Please Enter any Numeric Value :  ");
scanf("%f", &number);

logValue = log10(number);

printf("\n Logarithmic Value of %.2f base 10 = %.4f ", number, logValue);

return 0;
}```
`````` Please Enter any Numeric Value :  98.567

Logarithmic Value of 98.57 base 10 = 1.9937`````` Suresh is the founder of TutorialGateway and a freelance software developer. He specialized in Designing and Developing Windows and Web applications. The experience he gained in Programming and BI integration, and reporting tools translates into this blog. You can find him on Facebook or Twitter.