Difference between revisions of "Trunc"
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{{Trunc}} | {{Trunc}} | ||
| − | Function ''' | + | The [[RTL]] [[System unit]] contains [[Function|function]] '''trunc''' which truncates a [[Real|real]]-type value to an [[Integer]]-type value. |
| − | + | It's input parameter is a real-type [[expression]].Trunc returns a [[Longint]] value that is the value of the input parameter rounded toward zero. | |
| − | Declaration | + | |
| − | <syntaxhighlight> | + | == Declaration == |
| − | + | ||
| + | <syntaxhighlight lang="pascal"> | ||
| + | function Trunc(X: Real): Longint; | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | == Example Usage == | |
| − | + | ||
| − | + | <syntaxhighlight lang="pascal"> | |
| − | + | begin | |
| + | WriteLn( Trunc(8.7) ); | ||
| + | WriteLn( Trunc(8.3) ); | ||
| + | WriteLn( Trunc(-8.7) ); | ||
| + | WriteLn( Trunc(-8.3) ); | ||
| + | |||
| + | end; | ||
| + | </syntaxhighlight> | ||
| + | |||
| + | === Output === | ||
| + | 8 | ||
| + | 8 | ||
| + | -8 | ||
| + | -8 | ||
| + | |||
| + | == See also == | ||
| − | [[ | + | * [[Round|<syntaxhighlight lang="pascal" enclose="none">round</syntaxhighlight>]] |
| + | * {{Doc|package=RTL|unit=math|identifier=ceil|text=<syntaxhighlight lang="pascal" enclose="none">math.ceil</syntaxhighlight>}} - round up | ||
| + | * {{Doc|package=RTL|unit=math|identifier=floor|text=<syntaxhighlight lang="pascal" enclose="none">math.floor</syntaxhighlight>}} - round down | ||
| + | * [[Frac|<syntaxhighlight lang="pascal" enclose="none">frac</syntaxhighlight>]] - returns the fractional part of a floating point value | ||
| + | * [[Int|<syntaxhighlight lang="pascal" enclose="none">int</syntaxhighlight>]] - returns the integer part of a floating point value | ||
| + | * [[Div|<syntaxhighlight lang="pascal" enclose="none">div</syntaxhighlight>]] - integer division | ||
| + | * [[Comparison of approaches for rounding to an integer]] | ||
Revision as of 21:03, 3 September 2019
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The RTL System unit contains function trunc which truncates a real-type value to an Integer-type value. It's input parameter is a real-type expression.Trunc returns a Longint value that is the value of the input parameter rounded toward zero.
Declaration
function Trunc(X: Real): Longint;
Example Usage
begin
WriteLn( Trunc(8.7) );
WriteLn( Trunc(8.3) );
WriteLn( Trunc(-8.7) );
WriteLn( Trunc(-8.3) );
end;
Output
8 8 -8 -8
See also
roundmath.ceil- round upmath.floor- round downfrac- returns the fractional part of a floating point valueint- returns the integer part of a floating point valuediv- integer division- Comparison of approaches for rounding to an integer
