Python -

In a function, write a program that asks the user to enter a series of single-digit numbers with nothing separating them. The program should display the sum of all the single digit numbers in the string. For example if the user enters 2514, the method should return 12, which is the sum of 2, 5, 1, and 4.

Then in another function, ask the user if they want to run the program again. If yes, then run the program again.