How to solve this without using ASCII code?

how to solve without using ascii code??’

@fazalrehan0_gmail.com,

        if(ch >= 'a' && ch <= 'z')
            return 'L';
        else if(ch >= 'A' && ch <= 'Z')
            return 'U';
        else
            return 'I';

you can do this if you don’t want to use ascii code.

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