Python:

Write a program which repeatedly reads numbers until the user enters done. Once done is entered, print out the total, count, and average of the numbers. If the user enters anything other than a number, detect the mistake by using try and except structure, and print an error message and skip to the next number.

Example input and output:

Enter a number: 4

Enter a number: 5

Enter a number: a data

Invalid input

Enter a number: 7

Enter a number: done

16 5.33333333333