5.2 Write a program that repeatedly prompts a user for integer numbers until the user enters 'done'. Once 'done' is entered, print out the largest and smallest of the numbers. If the user enters anything other than a valid number catch it with a try/except and put out an appropriate message and ignore the number. Enter 7, 2, bob, 10, and 4 and match the output below.

largest = None

smallest = None

while True:

    try:

        num = input("Enter a number: ")

        if num == "done":

            break

#print (num)

        num = int(num)

        if largest is None or largest < num:

            largest = num

        elif smallest is None or smallest > num:

            smallest = num

    except ValueError:

            print("Invalid input")

print ("Maximum is", largest)

print ("Minimum is", smallest)