how to square a number in c++ code example

Example 1: square c++

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

int main()
{
	double x = 10.25, result;
	result = sqrt(x);
	cout << "Square root of " << x << " is " << result << endl;

	return 0;
}

Example 2: how to check sqrt of number is integer c++

bool isPerfectSquare(long double x) 
{   
  // Find floating point value of  
  // square root of x. 
  long double sr = sqrt(x); 
  
  // If square root is an integer 
  return ((sr - floor(sr)) == 0); 
}