maxmin.py

"""
 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:
    num = input("Enter a number: ")
    if num == "done" : 
    	break
    try:
        n = float(num)
    except:
        print("Invalid input")
        continue 
    if largest is None:
   	    largest = n
    elif n > largest:
        largest = n
    elif smallest is None:
        smallest = n
    elif n < smallest:
        smallest = n
print("Maximum is", int(largest))
print("Minimum is", int(smallest))