C log Function

The C log function is one of the math functions used to calculate the logarithmic value of the given number with base E. The syntax of the C log function is

double log(double number);

C log Function Example

The math Function allows you to find the logarithmic value of base E. This program will find the logarithmic value of different numbers and display the output.

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

int main()
{
    printf("\n The Logarithmic Value of 0       = %.4f ", log(0));
    printf("\n The Logarithmic Value of 1       = %.4f ", log(1));
    
    printf("\n The Logarithmic Value of 5       = %.4f ", log(5));
    printf("\n The Logarithmic Value of 16.4    = %.4f ", log(16.4));
    
    printf("\n The Logarithmic Value of -9.32   = %.4f ", log(-9.32));  
    printf("\n The Logarithmic Value of -15.34  = %.4f ", log(-15.34));
  
    return 0;
}

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

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

int main()
{
    float num, logValue;

    printf(" Please Enter any Numeric :  ");
    scanf("%f", &num);
  
    logValue = log(num);
  
    printf("\n Logarithmic of %.2f = %.4f ", num, logValue);
  
    return 0;
}

 Please Enter any Numeric :  25.765

 Logarithmic of 25.76 = 3.2490