Example: C++ program to calculate the square root of a number

C
C++
C#
Java
Python
PHP

// C++ program to calculate the square root of a number
#include <iostream>
#include <cmath>
// to import the sqrt() function
using namespace std;

int main() {
    double n, r;
    
    // n = number
    // r = root

    cout << "Enter any number to find the square root::\n";
    cin >> n;

    /* Calculate square root of number */
    r = sqrt(n);

    // Output
    cout << "Square root of " << n << " = " << r;
    return 0;
}