26.2 Recognizing Characters

  • IsDigitChar( c ) F

    checks whether the character c is a digit, i.e., occurs in the string "0123456789".

  • IsLowerAlphaChar( c ) F

    checks whether the character c is a lowercase alphabet letter, i.e., occurs in the string "abcdefghijklmnopqrstuvwxyz".

  • IsUpperAlphaChar( c ) F

    checks whether the character c is an uppercase alphabet letter, i.e., occurs in the string "ABCDEFGHIJKLMNOPQRSTUVWXYZ".

  • IsAlphaChar( c ) F

    checks whether the character c is either a lowercase or an uppercase alphabet letter.

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    GAP 4 manual
    February 2000