Check if Number is Even or Odd Using Bits in DSA Python - Build from Scratch

Check if Number is Even or Odd Using Bits

📖 Scenario: Imagine you are working with a simple calculator program that needs to quickly decide if a number is even or odd. Instead of using slow division, you want to use a fast trick with bits.

🎯 Goal: You will build a small program that uses bit operations to check if a number is even or odd.

📋 What You'll Learn

Create a variable called number with the exact value 29.

Create a variable called mask with the exact value 1.

Use a bitwise AND operation between number and mask to find if the number is even or odd.

Print "Odd" if the number is odd, otherwise print "Even".

💡 Why This Matters

🌍 Real World

Bitwise operations are used in low-level programming and performance-critical applications like games and embedded systems.

💼 Career

Understanding bitwise operations helps in roles like systems programming, firmware development, and optimizing algorithms.

1

Create the number variable

Create a variable called number and set it to 29.

DSA Python

# Create a variable called number and set it to 29
# Your code here

Hint

Use number = 29 to create the variable.

2

Create the mask variable

Create a variable called mask and set it to 1.

DSA Python

number = 29
# Create a variable called mask and set it to 1
# Your code here

Hint

The mask helps us check the last bit of the number.

3

Check if number is even or odd using bitwise AND

Use a bitwise AND operation between number and mask and store the result in a variable called result.

DSA Python

number = 29
mask = 1
# Use bitwise AND between number and mask and store in result
# Your code here

Hint

Use & operator to do bitwise AND.

4

Print if number is Even or Odd

Write an if statement to print "Odd" if result is 1, otherwise print "Even".

DSA Python

number = 29
mask = 1
result = number & mask
# Print "Odd" if result is 1 else print "Even"
# Your code here

Hint

If the last bit is 1, the number is odd; otherwise, it is even.