How to find duplicate number in string?

Question

If i type sololearn it shows o: 2, l: 2?? Help

Answer 1

You may use this code as reference:

https://code.sololearn.com/cTLVtH9p0iEo/?ref=app

But this is not complete for your task. You need to compare the string to all alphabets. I suggest using ASCII values.

https://code.sololearn.com/c9Gs7U4rok1z/?ref=app

So instead of comparing the string to just some characters, you try to iterate the ASCII list for alphabets.

Evaluate if frequency of character occurrence in string is more than 1.