def reverse_string(input_str):
    reversed_str = ""
    
    # Iterate
    for i in range(len(input_str) - 1, -1, -1):
        # Build the reversed string by appending each character to a new string
        reversed_str += input_str[i]
    
    return reversed_str

# Prompt the user to enter a string
input_str = input("Enter a string: ")

# Call the reverse_string function to get the reversed string
reversed_str = reverse_string(input_str)

# Print the reversed string
print("Reversed string:", reversed_str)