round function in c++

The round function in C++ is used to round a floating-point number to the nearest integer. It follows the round half to even method also known as "bankers' rounding". The function takes a single argument which is the floating-point number you want to round. If the argument is of type float, the return value is also of type float. If the argument is of type double, the return value is of type double. If the argument is of type long double, the return value is of type long double.