Chapter #6 – Flow of Control
Class 11 – Chapter 6 Solutions – PROGRAMMING EXERCISES #4
Write a program to check if the year entered by the user is a leap year or not
Python Program:
def is_leap_year(year):
"""Returns True if the year is a leap year, False otherwise."""
# A year is a leap year if:
# 1. It is divisible by 4
# 2. If it is divisible by 100, it must also be divisible by 400
if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):
return True
else:
return False
# Get user input
try:
year = int(input("Enter a year: ")) # Accepting input as an integer
if is_leap_year(year):
print(f"{year} is a leap year.")
else:
print(f"{year} is not a leap year.")
except ValueError:
print("Please enter a valid integer for the year.")
You can checkout this code from Github here – Programming Exercise – 4
Explanation of the Code:
1. Function Definition:
• is_leap_year(year): This function takes an integer year as input and checks
the conditions for a leap year:
• A year is a leap year if it is divisible by 4.
• However, if it is divisible by 100, it must also be divisible by 400 to be
considered a leap year.
2. User Input:
• The program prompts the user to enter a year and converts the input to an
integer.
• It uses try and except to handle invalid inputs gracefully.
3. Checking Leap Year:
• The program calls the is_leap_year() function with the entered year and
prints whether it is a leap year or not based on the returned value.
Example Output:
Enter a year: 2024
2024 is a leap year.
Enter a year: 2023
2023 is not a leap year.
NCERT Computer Science Class 11 Chapter 6 Solutions Q 9
