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Declaration: function IsDigitLetter (c: char): boolean;

The function IsDigitLetter returns TRUE if the character c is either a letter in the range of 'A' to 'Z' (either lower or upper case), or a decimal digit ('0' to '9'). Note that only the English alphabet is checked; umlauts or other letters of foreign languages are not recognized.

Last Update: 2012-Oct-20