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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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18
Task/Determine-if-a-string-is-numeric/Free-Pascal/determine-if-a-string-is-numeric.pas Normal file
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function isNumeric(const potentialNumeric: string): boolean;
var
potentialInteger: integer;
potentialReal: real;
integerError: integer;
realError: integer;
begin
integerError := 0;
realError := 0;
// system.val attempts to convert numerical value representations.
// It accepts all notations as they are accepted by the language,
// as well as the '0x' (or '0X') prefix for hexadecimal values.
val(potentialNumeric, potentialInteger, integerError);
val(potentialNumeric, potentialReal, realError);
isNumeric := (integerError = 0) or (realError = 0);
end;