How can we get ascii value of a digit and vice versa

Question

How to convert A to 65 and 97 to a

Answer 1

ord('A') -> 65
chr(65) -> 'A'

Answer 2

To convert 97 to a:
print(chr(int(input())))

Answer 3

Please tell how to convert A to 65 also

Answer 4

Can you tell how can I use the conversion in a loop