PHP Exercises: Compute the sum of the three integers. If one of the values is 13 then do not count it and its right towards the sum

Last update on May 30 2022 11:41:46 (UTC/GMT +8 hours)

PHP Basic Algorithm: Exercise-55 with Solution

Write a PHP program to compute the sum of the three integers. If one of the values is 13 then do not count it and its right towards the sum.

Sample Solution:

PHP Code :

<?php
function test($x, $y, $z)
{
   if ($x == 13) return 0;
   if ($y == 13) return $x;
   if ($z == 13) return $x + $y;
   return $x + $y + $z;
}

echo (test(4, 5, 7))."\n";
echo (test(7, 4, 12))."\n";
echo (test(10, 13, 12))."\n";
echo (test(13, 12, 18))."\n";

Sample Output:

Flowchart:

PHP Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a PHP program to compute the sum of three given integers. If the two values are same return the third value.
Next: Write a PHP program to compute the sum of the three given integers. However, if any of the values is in the range 10..20 inclusive then that value counts as 0, except 13 and 17.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

PHP: Tips of the Day

How to Sort Multi-dimensional Array by Value?

Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:

Example:

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

Starting in PHP 5.3, you can use an anonymous function:

usort($myArray, function($a, $b) {
    return $a['order'] - $b['order'];
});

And finally with PHP 7 you can use the spaceship operator:

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});

To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.

usort($myArray, function($a, $b) {
    $retval = $a['order'] <=> $b['order'];
    if ($retval == 0) {
        $retval = $a['suborder'] <=> $b['suborder'];
        if ($retval == 0) {
            $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder'];
        }
    }
    return $retval;
});

If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual

Ref : https://bit.ly/3i77vCC