Difference between revisions of "Int"
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== Behavior == | == Behavior == | ||
| − | <syntaxhighlight lang="delphi" inline>Int</syntaxhighlight> has effectively the following signature ({{gitlab|blob|FPC| | + | <syntaxhighlight lang="delphi" inline>Int</syntaxhighlight> has effectively the following signature ({{gitlab|blob|FPC|release_3_2_0/rtl/inc/mathh.inc#L116|actual declaration}} uses the compiler intrinsic): |
<syntaxhighlight lang="pascal">function Int(X: Real): Real;</syntaxhighlight> | <syntaxhighlight lang="pascal">function Int(X: Real): Real;</syntaxhighlight> | ||
<syntaxhighlight lang="delphi" inline>X</syntaxhighlight> must be a [[Real|real]]-type expression. | <syntaxhighlight lang="delphi" inline>X</syntaxhighlight> must be a [[Real|real]]-type expression. | ||
Latest revision as of 22:47, 10 August 2022
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The function Int returns the integer part of the argument.
It is an UCSD Pascal extension supported by the FPC as an InternProc.
Behavior
Int has effectively the following signature (actual declaration uses the compiler intrinsic):
function Int(X: Real): Real;
X must be a real-type expression.
The result is the integer part of X, rounded toward zero as a real value.
It is semantically equivalent to Trunc(X) * 1.0 (Trunc would cause an error if there did not exist an appropriate integer value).
Application
Intis used to do aTruncwithout leaving the domain ofrealnumbers. This speeds up things and virtually allows a larger range of permissible values. For an example see the implementation ofmath.FMod.
