Square root in C++ can be calculated using sqrt() function defined in math.h header file. This function takes a number as an argument and returns the square root of that number.
Below I have shared a program to find square root in C++. If you have any problem then you can freely ask it by commenting below.
Program for Square Root in C++
using namespace std;
cout<<"Enter any number:";
cout<<"Square root of "<<n<<" is "<<sq;
Enter any number:9
Square root of 9 is 3