How to Check if a String is a Binary String in Python

Submitted by razormist on Sunday, March 9, 2025 - 22:28.

In this tutorial, we’ll learn how to program “How to Check if a String is a Binary String in Python.” The objective is to safely check whether a string represents a binary number. This tutorial will guide you through the proper method for determining if a string is binary. So, let’s get started!

This topic is straightforward to understand. Just follow the instructions I provide, and you’ll complete it with ease. The program I’ll demonstrate will illustrate the correct way to check if a string is a binary number. So, let’s dive into the coding process!

Getting Started:

First you will have to download & install the Python IDLE's, here's the link for the Integrated Development And Learning Environment for Python https://www.python.org/downloads/.

Creating Main Function

This is the main function of the application. The following code will display a simple GUI in terminal console that will display program. To do this, simply copy and paste these blocks of code into the IDLE text editor.

import re
 
 
while True:
    print("\n================= Check if a String is a Binary String =================\n\n")
 
 
    s = input("Enter a number: ")
 
    if re.fullmatch('[01]+', s):
        print("This is a binary number!")
    else:
        print("This is not a binary number!")
 
 
    opt = input("\nDo you want to try again?(yes/no): ")
 
    if opt.lower() == 'yes':
            ret=False
    elif opt.lower() == 'no':
            ret=True
            print("Exiting program....")
    else:
            print("Please enter yes/no:")
            break
 
    if ret == False:
            continue

This program checks whether a given string consists only of binary digits (0s and 1s) using regular expressions. If the string matches the pattern [01]+, it is classified as a binary number; otherwise, it is not. The program then asks the user if they want to try again or exit.

Output:

There you have it we successfully created How to Check if a String is a Binary String in Python. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

More Tutorials for Python Language

Python Tutorials

How to Check if a String is a Binary String in Python

Getting Started:

Creating Main Function

Output:

Add new comment