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CBSE Class 12 Computer Science Question 99 of 105

Python Revision Tour — Question 5

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Question

Question 5

Write a program that asks the user the day number in a year in the range 2 to 365 and asks the first day of the year — Sunday or Monday or Tuesday etc. Then the program should display the day on the day-number that has been input.

Solution
dayNames = ["MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY", "SUNDAY"]

dayNum = int(input("Enter day number: "))
firstDay = input("First day of year: ")

if dayNum < 2 or dayNum > 365:
    print("Invalid Input")
else:
    startDayIdx = dayNames.index(str.upper(firstDay))
    currDayIdx = dayNum % 7 + startDayIdx - 1

    if currDayIdx >= 7:
        currDayIdx = currDayIdx - 7

    print("Day on day number", dayNum, ":", dayNames[currDayIdx])
Output
Enter day number: 243
First day of year: FRIDAY
Day on day number 243 : TUESDAY
Answer