In this post, we will learn how to find the cube root of a number using C++ Programming language.
The cube root of a number is the factor that we multiplied by itself three times to get that number.
Finding the cube root of a number is the opposite of cubing a number.
We will find the cube root of a number using the following approaches:
- Using Pow() Function
- Using cbrt() Function
So, without further ado, let’s begin this tutorial.
C++ Program to Find Cube Root of a Number
// C++ Program to Find Cube Root of a Number
#include <iostream>
#include <cmath>
using namespace std;
int main(){
int n, cubeRoot;
// Asking for input
cout << "Enter a number to find cube root: ";
cin >> n;
// Calculating cube root
cubeRoot = pow(n, 1.0/3.0);
// Displaying output
cout << "Cube root of " << n << " is: " << cubeRoot;
return 0;
}
Output
Enter a number to find cube root: 8
Cube root of 8 is: 2
How Does This Program Work ?
int n, cubeRoot;
In this program, we have declared two integer data type variables named n and cubeRoot.
// Asking for input
cout << "Enter a number to find cube root: ";
cin >> n;
The user is asked to enter an integer to find it’s cube root. This number gets stored in the n named variable.
// Calculating cube root
cubeRoot = pow(n, 1.0/3.0);
We used the pow() function to find the cube root of the entered number. The pow(base, exponent) function returns the value of a base raised to the power of another exponent.
pow(base, exponent) = base^ exponent
So, in this case we get: n⅓ which is the cube root of any number.
// Displaying output
cout << "Cube root of " << n << " is: " << cubeRoot;
The cube root calculated above is displayed on the screen using the cout statement.
C++ Program to Find Cube Root of a Number Using cbrt() Function
// C++ Program to Find Cube Root of a Number Using cbrt() Function
#include <iostream>
#include <cmath>
using namespace std;
int main(){
int n, result;
// Asking for input
cout << "Enter an integer: ";
cin >> n;
// Finding cube root using cbrt() function
result = cbrt(n);
// Displaying output
cout << "Cube root of " << n << " is: " << result;
return 0;
}
Output
Enter an integer: 27
Cube root of 27 is: 3
Conclusion
I hope after going through this post, you understand how to find the cube root of a number using C++ Programming language.
If you have any doubt regarding the program, then contact us in the comment section. We will be delighted to assist you.
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