Write A Program To Check Entered Number A Spy Number Or Not Through PHP Program

In this post I am going to discuss a program called, Entered Number A Spy Number Or Not Through PHP Program.

What is a Spy Number?

When you enter a natural number like 1124 then sum up its digit is equal to the product of all the digits. Like,

//Example:
Suppose n=1124
Product of digits on prod=(1 * 1 * 2 * 4) = 8
Sum of digits on sum=(1 + 1 + 2 + 4) = 8
Here, sum==prod both product and sum are equal.
Output: Spy Number

Input : 1412
Explanation : 
sum = (1 + 4 + 1 + 2) = 8
product = (1 * 4 * 1 * 2) = 8
since, sum == product == 8
Output : Spy Number

Input : 132
Explanation : 
sum = (1 + 3 + 2) = 6
product = (1 * 3 * 2) = 6
since, sum == product == 6
Output : Spy Number

C program to check number is a spy number or not:

<?php
// PHP program to check
// a spy number

// Function to check
// spy number
function checkSpy($num)
{
	$digit; $sum = 0;
	$product = 1;
	while ($num > 0)
	{
		$digit = $num % 10;
		
		// getting sum
		// of digits
		$sum += $digit;
		
		// getting product
		// of digits
		$product *= $digit;
		$num = $num / 10;
	}
	
	if ($sum == $product)
		return 1;
	else
		return -1;
}

// Driver code
$num = 1412;
if (checkSpy($num))
	echo "The number is a ".
		"Spy number","\n";
	
else
	echo "The number is NOT ".
		"a spy number","\n";

// This code is contributed by ajit.
?>