Conversion of string to upper case without inbuilt methods

Question

I am trying to perform conversion from a lowercase to uppercase on a string without using any inbuilt functions (other than ord() and char()). Following the logic presented on a

Answer 1

ord()- Return the Unicode code point for a one-character string.

You have to send a one character string as an argument. Here, you are sending the string 'abcd' which has 4 characters which is causing the issue. Send each character separately to the function and thus do 4 calls to the function to get the result.