Search for 'max' about the language you use.

I am new and I dont know the max function. I completed this one without using a max function.

thanks for help.i change datatype but still not working

See last bullet point: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution#when-i-print-my-answer-it-looks-exactly-the-same-as-the-expected-output-yet-tests-fail

The outputs look the same, what is my mistake?