llround37

llround37 is a mathematical function that rounds a floating-point number to the nearest integer value. It is part of the C standard library, specifically defined in the math.h header file. The function takes a single argument, which is the floating-point number to be rounded. The name "llround" is derived from "long long round," indicating that the result is of type long long int.

The llround37 function follows the IEEE 754 standard for floating-point arithmetic, which means it handles special cases such as NaN (Not a Number) and infinite values appropriately. If the argument is NaN, the function returns 0. If the argument is positive or negative infinity, the function returns the maximum or minimum value representable by the long long int type, respectively.

The function uses the "round to nearest, ties to even" rounding mode, also known as "bankers' rounding." This means that if the argument is exactly halfway between two integers, the function rounds to the nearest even integer. For example, llround37(2.5) returns 2, and llround37(3.5) returns 4.

The llround37 function is useful in situations where the result needs to be an integer, and the rounding behavior needs to be well-defined and consistent. It is particularly useful in financial and scientific calculations where rounding errors can have significant consequences.