Python Programs on Conditional Statements

Pogram 1: Write a python program to check a given number is Even or Odd.

Logic: If a number is evenly divisible by 2 with no remainder, then it is even.

Program: 

                                    
                                    
# Get input from user
number = int(input("Enter a number: "))

# Check if the number is even or odd
if number % 2 == 0:
    print(f"{number} is an even number.")
else:
    print(f"{number} is an odd number.")

Output:

Enter a number: 24
24 is an even number.

Enter a number: 37
37 is an odd number.

Pogram 2: Write a python program to find the greatest of 3 integer numbers.

Logic:

  • Compare the first number (x1) with the other two (x2 and x3).
  • If x1 is greater than or equal to both x2 and x3, then x1 is the greatest.
  • If not, check if x2 is greater than or equal to both x1 and x3.
  • If neither x1 nor x2 is the greatest, then x3 must be the greatest.

Program: 

                                    

# Get three numbers from user
x1 = int(input("Enter first number: "))
x2 = int(input("Enter second number: "))
x3 = int(input("Enter third number: "))

# Find the greatest number
if x1 >= x2 and x1 >= x3:
    greatest = x1
elif x2 >= x1 and x2 >= x3:
    greatest = x2
else:
    greatest = x3

# Display the result
print("The greatest number is:", greatest)

Output:

Enter first number: 45
Enter second number: 78
Enter third number: 23
The greatest number is: 78

Pogram 3: Write a python program to demonstrate nested if statement.

Program: 



# Student Grade Evaluator with Attendance Check

# Input student details
marks = float(input("Enter student's marks (0-100): "))
attendance = float(input("Enter attendance percentage (0-100): "))

# Outer if - Check if student meets minimum attendance requirement
if attendance >= 75:
    print("Attendance requirement satisfied. Checking marks...")
    
    # First level nested if - Grade determination
    if marks >= 90:
        grade = 'A'
    elif marks >= 80:
        grade = 'B'
    elif marks >= 70:
        grade = 'C'
    elif marks >= 60:
        grade = 'D'
    else:
        grade = 'F'
    
    # Second level nested if - Pass/Fail check
    if grade != 'F':
        print(f"Result: PASS with Grade {grade}")
    else:
        print("Result: FAIL")
        if marks < 30:
            print("Warning: Very low marks!")
    
else:
    print("Result: FAIL (Insufficient attendance)")
    if attendance < 50:
        print("Severe warning: Attendance below 50%!")

Output:

Enter student's marks (0-100): 85
Enter attendance percentage (0-100): 90

Attendance requirement satisfied. Checking marks...
Result: PASS with Grade B