Python Basic
Python Interview Programs
- Python Interview Programs
- Python Abundant Number
- Python Amicable Number
- Python Armstrong Number
- Python Average of N Numbers
- Python Automorphic Number
- Python Biggest of three numbers
- Python Binary to Decimal
- Python Common Divisors
- Python Composite Number
- Python Condense a Number
- Python Cube Number
- Python Decimal to Binary
- Python Decimal to Octal
- Python Disarium Number
- Python Even Number
- Python Evil Number
- Python Factorial of a Number
- Python Fibonacci Series
- Python GCD
- Python Happy Number
- Python Harshad Number
- Python LCM
- Python Leap Year
- Python Magic Number
- Python Matrix Addition
- Python Matrix Division
- Python Matrix Multiplication
- Python Matrix Subtraction
- Python Matrix Transpose
- Python Maximum Value of an Array
- Python Minimum Value of an Array
- Python Multiplication Table
- Python Natural Number
- Python Number Combination
- Python Odd Number
- Python Palindrome Number
- Python Pascalβs Triangle
- Python Perfect Number
- Python Perfect Square
- Python Power of 2
- Python Power of 3
- Python Pronic Number
- Python Prime Factor
- Python Prime Number
- Python Smith Number
- Python Strong Number
- Python Sum of Array
- Python Sum of Digits
- Python Swap Two Numbers
- Python Triangular Number
Python Program to Check Evil Number
Photo Credit to CodeToFun
π Introduction
In the realm of programming, understanding the properties of numbers is a fascinating journey. One interesting concept is that of Evil Numbers.
An Evil Number is a non-negative integer that has an even number of '1' bits in its binary representation.
In this tutorial, we will explore a Python program designed to check whether a given number is an Evil Number.
The program involves converting the decimal number to its binary representation and counting the number of '1' bits.
π Example
Let's delve into the Python code that accomplishes this task.
# Function to count the number of set bits (1s) in binary representation
def count_set_bits(number):
count = 0
while number:
count += number & 1
number >>= 1
return count
# Function to check if a number is an Evil Number
def is_evil_number(number):
# Count the number of set bits in the binary representation
set_bits_count = count_set_bits(number)
# If the count of set bits is even, it is an Evil Number
return set_bits_count % 2 == 0
# Driver program
if __name__ == "__main__":
# Replace this value with the number you want to check
number = 15
# Call the function to check if the number is an Evil Number
if is_evil_number(number):
print(f"{number} is an Evil Number.")
else:
print(f"{number} is not an Evil Number.")
π» Testing the Program
To test the program with different numbers, modify the value of number in the code.
15 is an Evil Number.
Run the script to check if the specified number is an Evil Number.
π§ How the Program Works
- The program defines a function count_set_bits that takes an integer number as input and returns the count of set bits (1s) in its binary representation.
- The function is_evil_number checks if the count of set bits is even, indicating that the number is an Evil Number.
- Inside the main program, replace the value of number with the desired number you want to check.
- The program calls the is_evil_number function and prints the result.
π Between the Given Range
Let's explore the python code that checks for Evil Numbers in the specified range.
# Function to check if a number is Evil
def is_evil_number(num):
binary_representation = bin(num)[2:]
count_of_ones = binary_representation.count('1')
return count_of_ones % 2 == 0
# Range from 1 to 10
start_range = 1
end_range = 10
# Display Evil Numbers in the range
evil_numbers = [num for num in range(start_range, end_range + 1) if is_evil_number(num)]
print(f"Evil numbers in the range {start_range} to {end_range}:")
for evil_num in evil_numbers:
print(evil_num, end=" ")
π» Testing the Program
Evil numbers in the range 1 to 10: 3 5 6 9 10
The range for this program is fixed from 1 to 10. To test the program, simply run it, and it will display the Evil Numbers in that range.
π§ How the Program Works
- The program defines a function is_evil_number that checks if a given number is an Evil Number based on its binary representation.
- It then iterates through the specified range (from 1 to 10), checks each number, and collects Evil Numbers in a list.
- Finally, it prints the Evil Numbers in the specified output format.
π§ Understanding the Concept of Evil Number
Before delving into the code, let's understand the concept of Evil Numbers. An Evil Number is a non-negative integer that has an even number of '1' bits in its binary representation.
π’ Optimizing the Program
While the provided program is effective, consider exploring and implementing alternative approaches or optimizations for checking Evil Numbers.
Feel free to incorporate and modify this code as needed for your specific use case. Happy coding!
π¨βπ» Join our Community:
Author
For over eight years, I worked as a full-stack web developer. Now, I have chosen my profession as a full-time blogger at codetofun.com.
Buy me a coffee to make codetofun.com free for everyone.
Buy me a Coffee
If you have any doubts regarding this article (Python Program to Check Evil Number), please comment here. I will help you immediately.