Überprüfen, ob ein String auch ein anderer Datentyp sein kan

[Klaus01]

Vielleicht ist val das was Du suchst?

Aus der Hilfe:

Zitat:

Converts a string to a numeric representation.

Unit

System

Category

string handling routines

procedure Val(S; var V; var Code: Integer);

Description

Val converts the string value S to its numeric representation, as if it were read from a text file with Read.

S is a string-type expression; it must be a sequence of characters that form a signed real number.

V is an integer-type or real-type variable. If V is an integer-type variable, S must form a whole number.

Code is a variable of type Integer.

If the string is invalid, the index of the offending character is stored in Code; otherwise, Code is set to zero. For a null-terminated string, the error position returned in Code is one larger than the actual zero-based index of the character in error.

Val performs range checking differently depending upon the setting of the $R compiler directive and the type of the parameter V.

Setting Result

{$R+} An out-of-range value always generates a run-time error.
{$R-} The values for out-of-range vary depending upon the data type of V.

Grüße
Klaus