PHP Exercises: Check if a given positive number is a multiple of 3 or a multiple of 7

PHP Basic Algorithm: Exercise-10 with Solution

Write a PHP program to check if a given positive number is a multiple of 3 or a multiple of 7.

Sample Solution:

PHP Code :

<?php
// Define a function named "test" that takes a parameter $n
function test($n) 
{
    // Use the modulo operator to check if $n is divisible by 3 or 7
    return $n % 3 == 0 || $n % 7 == 0;
}

// Call the test function with argument 3 and var_dump the result
var_dump(test(3));

// Call the test function with argument 14 and var_dump the result
var_dump(test(14));

// Call the test function with argument 12 and var_dump the result
var_dump(test(12));

// Call the test function with argument 37 and var_dump the result
var_dump(test(37));
?>

Explanation:

• Function Definition:
• The function test takes one parameter, $n.
• Divisibility Check:
• Uses the modulo operator % to check if $n is divisible by either 3 or 7.
• Returns true if $n is divisible by 3 ($n % 3 == 0) or by 7 ($n % 7 == 0); otherwise, returns false.
• Function Calls and Output:
• First Call: test(3)
• 3 % 3 == 0, so it returns true.
• Second Call: test(14)
• 14 % 7 == 0, so it returns true.
• Third Call: test(12)
• 12 % 3 == 0, so it returns true.
• Fourth Call: test(37)
• 37 is not divisible by either 3 or 7, so it returns false.

Output:

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

Visual Presentation:

Flowchart:

PHP Code Editor:

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