Python Program to check Natural Number

Posted in Python Tutorial

Updated on Jan 11, 2024

By Mari Selvan

👁️ 77 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

🙋 Introduction

In the realm of programming, understanding and validating numbers is a fundamental task. One common classification is that of natural numbers.

A natural number is a positive integer greater than zero.

In this tutorial, we'll explore a simple Python program that checks whether a given number is a natural number.

📄 Example

Let's delve into the Python code that accomplishes this functionality.

is_natural_number.py

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# Function to check if a number is a natural number
def is_natural_number(num):
    return True if num > 0 else False

# Driver program
if __name__ == "__main__":
    # Replace this value with your desired number
    number = 42

    # Check if the number is a natural number
    if is_natural_number(number):
        print(f"{number} is a natural number.")
    else:
        print(f"{number} is not a natural number.")

💻 Testing the Program

To test the program with different numbers, replace the value of number in the if __name__ == "__main__": block.

Output

42 is a natural number.

Run the script to see if the given number is a natural number.

🧠 How the Program Works

The program defines a function is_natural_number that takes a number as input and returns True if it's a natural number (greater than 0) and False otherwise.
In the if __name__ == "__main__": block, replace the value of number with the desired number.
The program then checks if the number is a natural number using the is_natural_number function.
It prints whether the number is a natural number or not based on the result.

🤔 Considerations

The program assumes the input number is an integer.
For user input scenarios, additional validation may be required to handle non-integer inputs.

📏 Between the Given Range

Let's dive into the python code that checks and displays natural numbers in the range from 1 to 10.

check_natural_numbers.py

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# Function to check and display natural numbers in the range 1 to 10
def check_natural_numbers():
    start_range = 1
    end_range = 10

    # Displaying the header
    print(f"Natural Numbers in the Range {start_range} to {end_range}:")

    # Loop through the range and check for natural numbers
    for num in range(start_range, end_range + 1):
        print(num, end=" ")

# Call the function to check and display natural numbers
check_natural_numbers()

💻 Testing the Program

Output

Natural Numbers in the range 1 to 10:
1 2 3 4 5 6 7 8 9 10

Run the script to see the natural numbers in the range from 1 to 10.

🧠 How the Program Works

The program defines a function check_natural_numbers that sets the range from 1 to 10 (inclusive).
Inside the function, it uses a for loop to iterate through each number in the specified range.
For each iteration, it prints the natural numbers.

🧐 Understanding the Concept of Natural Numbers

Natural numbers are a set of positive integers that start from 1 and continue indefinitely. They are often used for counting and ordering.

In this program, we check whether a given number is a natural number by verifying if it is greater than zero.

🎉 Conclusion

This python program serves as a foundational example for checking whether a number is a natural number or not. Understanding the characteristics of natural numbers and incorporating such checks can be essential in various programming scenarios

Feel free to incorporate and modify this code as needed for your specific use case. Happy coding!