Question

I need help with a Python program that has error checking loops. Hour must be a number from 1 to 12. Minute and second must be numbers from 0 to 59. Also check whether “AM” or “PM” is entered. Every time an invalid value is entered, display an error message and ask the user to re-enter a valid value immediately. Functions are not covered yet and are not necessary. Thanks.

The following is an example:
Enter hour: 0
Hour must be from 1 to 12.
Enter hour: 13
Hour must be from 1 to 12.
Enter hour: 12
Enter minute: -1
Minute must be from 0 to 59.
Enter minute: 60
Minute must be from 0 to 59.

Answer 1

hours = int(input("Enter hour: "))
while (hours<1) or (hours>12):
    print("Hour must be from 1 to 12.")
    hours = int(input("Enter hour: "))
minute = int(input("Enter minute: "))
while (minute<0) or (minute>59):
    print("Hour must be from 0 to 59.")
    minute = int(input("Enter minute: "))
n = input("Enter AM/PM: ")
while (n.lower()!="am") and (n.lower()!="pm"):
    print("It must be either AM or PM")
    n = input("Enter AM/PM: ")
print(hours,":",minute,"",n)

Output:

Enter hour: 0 Hour must be from 1 to 12. Enter hour: 13 Hour must be from 1 to 12. Enter hour: 12 Enter minute: -1 Hour must be from 0 to 59. Enter minute: 60 Hour must be from 0 to 59. Enter minute: 52 Enter AM/PM: AM 12 : 52 AM Process finished with exit code 0