C++ cbrt()

The cbrt() function in C++ returns the cube root of a number.
[Mathematics]  ∛x = cbrt(x) [In C Programming]

This function is defined in <cmath> header file.


cbrt() prototype [As of C++ 11 standard]

double cbrt(double x);
float cbrt(float x);
long double cbrt(long double x);
double cbrt(T x); // For integral type

cbrt() Parameters

The cbrt() function takes a single argument whose cube root is to be calculated.


cbrt() Return value

The cbrt() function returns the cube root of the given argument.


Example 1: How cbrt() works in C++?

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    double x = -1000.0, result;
    result = cbrt(x);
    cout << "Cube root of " << x << " is " << result << endl;

    return 0;
}

When you run the program, the output will be:

Cube root of -1000 is -10

Example 2: cbrt() function With integral Argument

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    long x = 964353422;
    double result = cbrt(x);
    cout << "Cube root of " << x << " is " << result << endl;
	
    return 0;
}

When you run the program, the output will be:

Cube root of 964353422 is 987.974