When it is required to form a new string where the first and last characters are exchanged, a method can be defined that uses indexing to form the new string.
Below is the demonstration of the same −
def exchange_val(my_string): return my_string[-1:] + my_string[1:-1] + my_string[:1] my_string = “Hi there how are you” print(“The string is :”) print(my_string) print(“The modified string is :”) print(exchange_val(my_string))
The string is : Hi there how are you The modified string is : ui there how are yoH
A method named ‘exchange_val’ is defined that takes a string as a parameter.
It uses indexing to exchange the first and last characters of a string.
Outside the method, a string is defined, and is displayed on the console.
This method is called by passing the string as a parameter to it.
This is displayed as output on the console.