Reverse a string without using library functions

Question

Help me in thi not getting correct output

Answer 1

Please tag the relevant programming language and show your code attempt.

Answer 2

Python solution:
'racecar'[::-1]
Does list slicing count as a library? I wonder.
How can you expect people to analyze and debug your code, if you do not link the code itself?

Answer 3

Where is the code