C++ Program to find the square root of a number

In this example, You will learn How to Find Square Root of a Number in C++ by using a predefined library Function ( Math.h).

ans = sqrt(num);

4 = sqrt(16);

Example: Find square Root of a Number in C++.

using namespace std;

int main() {

    float num, ans;
    cout << "Enter a number:";
    cin >> num;

    ans = sqrt(num);
    cout << "Square root of " << num << " is :" << ans;

    return 0;


Enter a number:16
Square root of 16 is :4