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PHP Exercises: Check which number nearest to the value 100 among two given integers

PHP Basic Algorithm: Exercise-19 with Solution

Write a PHP program to check which number nearest to the value 100 among two given integers. Return 0 if the two numbers are equal.

Sample Solution:

PHP Code :

<?php
function test($x, $y) 
{
   $n = 100;
   $val = abs($x - $n);
   $val2 = abs($y - $n);
   return $val == $val2 ? 0 : ($val < $val2 ? $x : $y);
}

echo test(78, 95)."\n";
echo test(95, 95)."\n";
echo test(99, 70)."\n";

Sample Output:

95
0
99

Pictorial Presentation:

PHP Basic Algorithm Exercises: Check which number nearest to the value 100 among two given integers.
PHP Basic Algorithm Exercises: Check which number nearest to the value 100 among two given integers.

Flowchart:

Flowchart: Check which number nearest to the value 100 among two given integers.

PHP Code Editor:

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Previous: Write a PHP program to check the largest number among three given integers.
Next: Write a PHP program to check whether two given integers are in the range 40..50 inclusive, or they are both in the range 50..60 inclusive.

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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