**`log10f()`** in C calculates the `base-10` logarithm of a floating point value. `log10f()` is defined in the `math.h` header file and the function declaration is as follows:
```C
float log10f(float arg);
```
# Parameters and return value
`arg`: floating point value


#include <math.h>                                                               
#include <stdio.h>                                                              
                                                                                
int main(void)                                                                  
{       
    printf("log10f(100) = %f\n", log10f(100));
    printf("log10f(0.0001) = %f\n", log10f(0.0001));
    /* special cases */
    printf("log10f(1) = %f\n", log10f(1));
    printf("log10f(0) = %f\n", log10f(0));
    printf("log10f(0) = %f\n", log10f(-10));
    printf("log10f(+inf) = %f\n", log10f(INFINITY));
    printf("log10f(nan) = %f\n", log10f(NAN));

    return 0;                     
}              

gcc compiler

>  You need to include the `math` library using `-lm` flag when you compile any program that uses `log10f()`.

# Explanation

First, we import the `math.h` header file from the C standard library. The program then  prints the output of `log10f()` on possible example values. You can confirm the output using the table above.

gcc.tar.gz

What is log10f () in C?

Calculates base-10 logarithm of a float in C. Declared in math.h, use -lm to compile.

Input	Output	Error Raised
> 0 and no error occurs	base-10 logarithm	-
1	+0	-
+∞	+∞	-
NaN	NaN	-
< 0	NaN	Domain error
±0	-∞	Pole error

What is log10f () in C?

Parameters and return value

Example Program

Explanation