Question

In this lab, you add the input and output statements to a partially completed Python program. When completed, the user should be able to enter a year, a month, and a day. The program then determines if the date is valid. Valid years are those that are greater than 0, valid months include the values 1 through 12, and valid days include the values 1 through 31.

Instructions

1. Notice that variables have been declared for you.
2. Write input statements to retrieve a year, a month, and a day from the user.
3. Include the print statements to output the following:

   month/day/year is a valid date.

   or

   month/day/year is an invalid date. 

4. Execute the program entering the following input:

   month = 5, day = 32 year = 2014

5. Execute the program entering the following input:

   month = 9 day = 21 year = 2002

Answer 1

Answer:

Explanation:

Here is the progra which takes month, day and year as input using the input functions and then if elif else blocks are used to check whether the date is invalid or valid.

Code:

month = int(input('Enter month: '))
day = int(input('Enter day: '))
year = int(input('Enter year: '))

if(year<=0):
print(str(month)+'/'+str(day)+'/'+str(year)+' is an invalid date.')
elif(month<1 or month>12):
print(str(month)+'/'+str(day)+'/'+str(year)+' is an invalid date.')
elif(day<1 or day>30):
print(str(month)+'/'+str(day)+'/'+str(year)+' is an invalid date.')
else:
print(str(month)+'/'+str(day)+'/'+str(year)+' is a valid date.')

Output: