 # 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`