PHP Program to check Natural Number

Posted in PHP Tutorial

Updated on Oct 31, 2024

By Mari Selvan

👁️ 60 - 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 will explore a PHP program that checks whether a given number is a natural number.

📄 Example

Let's examine the PHP code that achieves this functionality.

isNaturalNumber.php

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<?php
// Function to check if a number is a natural number
function isNaturalNumber($num)
{
  return ($num > 0) ? true : false;
}

// Driver program
// Replace this value with your desired number
$number = 42;

// Check if the number is a natural number
if (isNaturalNumber($number))
{
  echo "$number is a natural number.\n";
}
else
{
  echo "$number is not a natural number.\n";
}

?>

💻 Testing the Program

To test the program with different numbers, replace the value of $number in the script.

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 isNaturalNumber that takes a number as input and returns true if it's a natural number (greater than 0) and false otherwise.
In the main part of the script, replace the value of $number with the desired number.
The program then checks if the number is a natural number using the isNaturalNumber 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 php code that checks and displays natural numbers in the range from 1 to 10.

isNatural.php

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<?php
// Function to check if a number is natural
function isNatural($number)
{
  return $number > 0 && is_int($number);
}

// Display natural numbers in the range 1 to 10
echo "Natural Numbers in the Range 1 to 10: ";

for ($i = 1;$i <= 10;$i++)
{
  if (isNatural($i))
  {
    echo $i . " ";
  }
}

?>

💻 Testing the Program

Output

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

The provided code has a fixed range from 1 to 10. You can run the script to see the natural numbers within this range.

🧠 How the Program Works

The program defines a function isNatural that checks if a number is a natural number by ensuring it is a positive integer.
The for loop iterates through the numbers from 1 to 10.
For each iteration, the program checks if the current number is a natural number using the isNatural function.
If it is, the number is displayed.

🧐 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 php 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!