How to check the string for the presence of letters in a shorter way than just a search and a huge condition?

    3 answers 3

    This is simply solved using regular expressions.

    Regex.IsMatch(test, "^[^x]+$");
    • test - string to check
    • ^ - beginning of line
    • [^x] - all characters except x
    • + - one or more occurrences
    • $ - end of line

    As a result, the string will be checked for the presence of the letter x .

       if (str.Any(c => char.IsLetter(c)))

        take the first character if it is 0, neOK, if 1 - neOK, etc. =), if A - OK - is it long?

         char.isLetter();