# PHP Exercises: Compute the digit number of sum of two given integers

## PHP: Exercise-47 with Solution

Write a PHP program to compute the digit number of sum of two given integers.

**Input:**

Each test case consists of two non-negative integers x and y which are separated by a space in a line.

0 ≤ x, y ≤ 1,000,000

**Pictorial Presentation: **

**Sample Solution: **

**PHP Code:**

```
<?php
// Infinite loop to continuously read input from STDIN
while (true) {
// Read and split the input line into an array of strings
$inputs = explode(' ', trim(fgets(STDIN)));
// Check if the input is not an array or has fewer than 2 elements
if (!is_array($inputs) || count($inputs) < 2) {
exit; // Exit the program if conditions are met
}
// Extract the first and second elements from the input array
$a = $inputs[0];
$b = $inputs[1];
// Call the numDigits function to calculate the number of digits in the sum
$d = numDigits($a + $b);
// Print the result with a descriptive message
echo("Digit number of sum of two given integers: ");
echo $d . "\n";
}
// Function to calculate the number of digits in a given number
function numDigits($n) {
return (int)(log10($n) + 1);
}
?>
```

Sample Output:

Digit number of sum of two given integers: 2

**Flowchart: **

**PHP Code Editor:**

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**Next:** Write a PHP program to check whether three given lengths (integers) of three sides form a right triangle. Print "Yes" if the given sides form a right triangle otherwise print "No".

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