PHP Exercises: Check if two given non-negative integers have the same last digit

PHP Basic Algorithm: Exercise-23 with Solution

Write a PHP program to check if two given non-negative integers have the same last digit.

Sample Solution:

PHP Code :

<?php
// Define a function that checks if the last digits of two numbers have the same absolute value
function test($x, $y) 
{
    // Check if the absolute value of the last digit of both numbers is the same
    return abs($x % 10) == abs($y % 10);
}

// Test the function with different number pairs
var_dump(test(123, 456));
var_dump(test(12, 512));
var_dump(test(7, 87));
var_dump(test(12, 45));
?>

Explanation:

• Function Definition:
• The test function takes two integer parameters $x and $y and checks if their last digits have the same absolute value.
• Last Digit Comparison:
• The last digit of each number is obtained using the modulus operator (% 10), which provides the remainder when divided by 10.
• The abs function ensures that the comparison is based on the absolute value of the last digits (to handle negative numbers).
• It then checks if the last digits are the same and returns true if they are; otherwise, it returns false.

Output:

bool(false)
bool(true)
bool(true)
bool(false)

Visual Presentation:

Flowchart:

PHP Code Editor:

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