Difference between revisions of "Round"
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The [[RTL]] [[System unit]] contains function '''Round''', which rounds a [[Real]]-type value to an [[Integer]]-type value. | The [[RTL]] [[System unit]] contains function '''Round''', which rounds a [[Real]]-type value to an [[Integer]]-type value. | ||
It's input parameter is a real-type expression and Round returns a [[Longint]] value that is the value of the input rounded to the nearest whole number. If the input value is exactly halfway between two whole numbers - N.5 - then "bankers rounding" is used, with the result being the nearest even number. | It's input parameter is a real-type expression and Round returns a [[Longint]] value that is the value of the input rounded to the nearest whole number. If the input value is exactly halfway between two whole numbers - N.5 - then "bankers rounding" is used, with the result being the nearest even number. | ||
Revision as of 21:44, 22 March 2018
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The RTL System unit contains function Round, which rounds a Real-type value to an Integer-type value. It's input parameter is a real-type expression and Round returns a Longint value that is the value of the input rounded to the nearest whole number. If the input value is exactly halfway between two whole numbers - N.5 - then "bankers rounding" is used, with the result being the nearest even number.
Declaration:
function Round(X: Real): Longint;
begin
WriteLn( Round(8.7) );
WriteLn( Round(8.3) );
// examples of "bankers rounding" - .5 is adjusted to the nearest even number
WriteLn( Round(2.5) );
WriteLn( Round(3.5) );
end.Output:
9
8
2
4
See also:
