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cbrt() function with example in C++

C++ cbrt() function: Here, we are going to learn about the cbrt() function with example of cmath header in C++ programming language?
Submitted by IncludeHelp, on April 26, 2019

C++ cbrt() function

cbrt() function is a library function of cmath header, it is used to find the cubic root of a given number, it accepts a number and returns the cubic root.

Syntax of cbrt() function:


Parameter(s): x – a number whose cubic root to be calculated.

Return value: double – it returns double value that is the cubic root of the given number x.


    int x = 2;

    Function call:


C++ code to demonstrate the example of cbrt() function

// C++ code to demonstrate the example of 
// cbrt() function

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

// main code section
int main()
    float x;
    //input the value
    cout<<"Enter a number: ";

    // calculate the square root
    float result = cbrt(x);
    cout<<"cubic root of "<<x<<" is = "<<result;
    return 0;


First run:
Enter a number: 10 
cubic root of 10 is = 2.15443 

Second run:
Enter a number: 123.45 
cubic root of 123.45 is = 4.97925 

Third run:
Enter a number: 0
cubic root of 0 is = 0

Fourth run:
Enter a number: -1234
cubic root of -1234 is = -10.726 

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