C Program - Cube Root of a Number

If a number is multiplied by itself two times (n*n*n), the final number will be the cube of that number and finding the cube root of a number is inverse operation of cubing the number. If x is the cube root of y, it can be expressed as below:

Alternatively, it can also be expressed as:

x³ = y

Method 1: Using cbrt() function of C <math.h> header file

The cbrt() function of C <math.h> header file can be used to return cube root of a number.

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

int main() {
 double x = 64;
 double y = 125;

 double x1 = cbrt(x);
 double y1 = cbrt(y);
 printf("Cube root of %.2f is %.2f\n", x, x1);
 printf("Cube root of %.2f is %.2f\n", y, y1);
}

The above code will give the following output:

Cube root of 64.00 is 4.00
Cube root of 125.00 is 5.00

Method 2: Using pow() function of C <math.h> header file

The pow() function of C <math.h> header file can also be used to calculate cube root of a number.

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

int main() {
 double x = 64;
 double y = 125;

 double x1 = pow(x, 1/3.0);
 double y1 = pow(y, 1/3.0);
 printf("Cube root of %.2f is %.2f\n", x, x1);
 printf("Cube root of %.2f is %.2f\n", y, y1);
}

The above code will give the following output:

Cube root of 64.00 is 4.00
Cube root of 125.00 is 5.00