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

Last update on May 28 2025 09:29:39 (UTC/GMT +8 hours)

19. Nearest to 100 Check

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
// Define a function that takes two parameters and returns the one closer to the value 100
function test($x, $y) 
{
   // Define the target value
   $n = 100;
   
   // Calculate the absolute difference between $x and $n
   $val = abs($x - $n);
   
   // Calculate the absolute difference between $y and $n
   $val2 = abs($y - $n);
   
   // Compare the absolute differences and return the value closer to $n
   return $val == $val2 ? 0 : ($val < $val2 ? $x : $y);
}

// Test the function with different sets of values
echo test(78, 95)."\n";
echo test(95, 95)."\n";
echo test(99, 70)."\n";
?>

Explanation:

Function Definition:

The test function takes two parameters, $x and $y.

Target Value:

A variable $n is defined and set to 100, representing the target value to compare against.

Absolute Differences:

The absolute difference between $x and $n is calculated and stored in $val.
The absolute difference between $y and $n is calculated and stored in $val2.

Comparison and Return:

If $val (difference of $x from 100) equals $val2 (difference of $y from 100), the function returns 0 (indicating both are equally close).
If $val is smaller than $val2, the function returns $x (as it’s closer to 100).
Otherwise, it returns $y (indicating $y is closer to 100).

Output:

95
0
99

Pictorial Presentation:

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

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP function to determine which of two integers is closer to 100, returning 0 if they are equidistant.
Write a PHP script to compute the absolute difference from 100 for two numbers and compare the results for proximity.
Write a PHP program to calculate and return the integer nearest to 100, handling tie cases explicitly.
Write a PHP script to implement a comparison mechanism that outputs the number closer to 100 using conditional operators.

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PHP Code Editor:

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