C++ <cmath> - sqrt() Function
The C++ <cmath> sqrt() function returns the square root of the given number.
Syntax
double sqrt (double x); float sqrt (float x); long double sqrt (long double x);
double sqrt (double x); float sqrt (float x); long double sqrt (long double x); //additional overloads for integral types double sqrt (T x);
Parameters
x |
Specify a positive number. |
Return Value
Returns the square root of the specified number.
If the x is negative, domain error occurs.
Example:
In the example below, sqrt() function is used to find out the square root of the given number.
#include <iostream>
#include <cmath>
using namespace std;
int main (){
cout<<sqrt(25)<<"\n";
cout<<sqrt(30)<<"\n";
cout<<sqrt(35.5)<<"\n";
cout<<sqrt(100)<<"\n";
return 0;
}
The output of the above code will be:
5 5.47723 5.95819 10
❮ C++ <cmath> Library
