log() : logarithm of x to the base e
We will get log value of any number with base e by using
log() function.
log(x) Example
#include <stdio.h>
#include <math.h>
int main(void){
double x,ret;
x=3.54;
ret=log(x);
printf("log(%.2f)=%.2f", x,ret);
return 0;
}log(3.54)= 1.26
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Math functions in C
abs() : Absolute value of input number
floor() : Highest integer lower than the input data
ceil() : Lowest integer higher than the input data
hypot() : hypotenuse of two input numbers
log() : log value of number with base e
log10() : log value of number with base 10
pow() : x to the power y ( two input numbers )
fmod() : remainder after division of numbers
round() : Rounding to nearest integer
sqrt() : Square root of a given number
sin() cos() tan()
sinh() cosh() tanh()
trunc() : Truncation of number