System.Round Function

Returns the value of X rounded to the nearest whole number.

Pascal

function Round(X: Extended): Int64;

C++

Int64 Round(Extended X);

File

System

Description

In Delphi, the Round function rounds a real-type value to an integer-type value.

X is a real-type expression. Round returns an Int64 value that is the value of X rounded to the nearest whole number. If X is exactly halfway between two whole numbers, the result is always the even number. This method of rounding is often called "Banker's Rounding".

If the rounded value of X is not within the Int64 range, a runtime error is generated, which can be handled using the EInvalidOp exception.

Note: The behavior of Round can be affected by the Set8087CW procedure or SetRoundMode function.