Catch exceptions

example.py

while True:
    try:
        subtrack = int(input("Enter a digit between 1 and 10 to subtract: "))
        if subtrack < 0:
            print("Please enter a positive number")
            continue
        elif 0 < subtrack <= 10:
            break
        else:
            print("Please enter a number between 1 and 10")
            continue
    except ValueError:
        print("Please enter a valid number")

example2.py

while True:
    try:
        subtract = int(input("Enter a digit between 0-10 to subtract: "))
        if subtract < 0 or subtract > 10:
            print("Incorrect entry. Try again")
            continue
        break
    except ValueError:
        print("Please enter a valid number")


while True:
    try:
        start = int(input("Enter a digit greater than " + str(subtract) + " to start: "))
        if start <= subtract:
            print(start, "is not greater than", subtract, "!")
            continue
        break
    except ValueError:
        print("Please enter a valid number")

print("Starting the countdown from", start)

while True:
    start = start - subtract
    print("The next number is:", start)
    if start <= 0:
        print("The countdown is over!")
        break