Your code is mostly correct but has some inefficiencies and areas where it can be improved for better readability and performance. Below is the analysis, along with the optimized version. --- Issues in Your Code: 1. Variable b is unnecessary You can directly print the result instead of using an extra variable. 2. Logic is correct but can be more readable The nested if conditions can be refactored for better clarity. 3. Edge Cases Handling The input should be validated to ensure it’s a positive integer. --- Optimized and Improved Code # Program to check if a year is a leap year or not try: year = int(input("Enter the year to check if it is a leap year or not: ")) if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0): print(year, "is a leap year") else: print(year, "is not a leap year") except ValueError: print("Invalid input! Please enter a valid year (integer).") --- Improvements and Best Practices: 1. Avoid unnecessary variable (b) Instead of using b=0 and b=1, we directly check conditions inside if. 2. Use or for a clear condition The leap year condition can be combined in a single if statement for better readability. 3. Exception Handling Used try-except to handle cases where the user enters non-numeric values. 4. Better Readability and Efficiency Code is easier to read and avoids unnecessary indentation. --- How It Works? A year is a leap year if: It is divisible by 4 and not divisible by 100 or It is divisible by 400. The program first checks if the input is a valid number. Then, it applies the leap year conditions and prints the result. This optimized version improves performance slightly and makes the code more maintainable!