1. Prompts the user for input of a string
2. Uses for loop to loop through each character of string and inserting each character to the beginning of a list which starts out as empty list (Note: a string can be viewed as a list of characters/letters).
3. Uses for loop to loop through each character of the inserted list and prints out each character/letter so that the input string from step 1. is now print out in reverse. (Note: to print multiple print statements without newline character between them, just pass in a 2nd named parameter of
end=""which tells it to not end a line with newline character).