Difference between revisions of "Round"
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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. | ||
| − | + | == Declaration == | |
| − | <syntaxhighlight> | + | |
| + | <syntaxhighlight lang="pascal"> | ||
function Round(X: Real): Longint; | function Round(X: Real): Longint; | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | ||
| − | <syntaxhighlight> | + | == Example Usage == |
| + | |||
| + | <syntaxhighlight lang="pascal"> | ||
begin | begin | ||
WriteLn( Round(8.7) ); | WriteLn( Round(8.7) ); | ||
| Line 19: | Line 22: | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | === Output === | |
| − | + | ||
| − | 9 | + | 9 |
| − | 8 | + | 8 |
| − | 2 | + | 2 |
| − | 4 | + | 4 |
| − | + | ||
| + | == See also == | ||
| − | |||
* [[Int]] | * [[Int]] | ||
* [[Trunc]] | * [[Trunc]] | ||
Revision as of 01:19, 10 August 2019
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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;
Example Usage
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
