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Applies to: ~>0.1
function IsProper: Boolean;
The IsProper method checks if a TFraction instance is a proper fraction and returns True if so or False if not.
A proper fraction is one whose absolute value is less than 1, i.e. the absolute value of its numerator is less than its denominator.
var F: TFraction; begin F := TFraction.Create(-2, 3); Assert(F.IsProper); F := TFraction.Create(3, 4); Assert(F.IsProper); F := TFraction.Create(7, 4); Assert(not F.IsProper); end;
Another test for a proper fraction is to check whether its WholeNumberPart property is 0. If the property is 0 then the fraction is proper, otherwise it is not.