PHP Exercises: Check a given array of integers and return true if the array contains 10 or 20 twice

PHP Basic Algorithm: Exercise-97 with Solution

Write a PHP program to check a given array of integers and return true if the array contains 10 or 20 twice. The length of the array will be 0, 1, or 2.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that takes an array of numbers as a parameter
function test($nums)
 { 
    // Return true if the array has exactly two elements and
    // either both elements are 10 or both elements are 20
    return sizeof($nums) == 2 && (($nums[0] == 10 && $nums[1] == 10) || ($nums[0] == 20 && $nums[1] == 20));
 }   

// Check and display the result of calling 'test' with the array [12, 20]
var_dump(test([12, 20]));

// Check and display the result of calling 'test' with the array [20, 20]
var_dump(test([20, 20]));

// Check and display the result of calling 'test' with the array [10, 10]
var_dump(test([10, 10]));

// Check and display the result of calling 'test' with the array [10]
var_dump(test([10]));
?>

Explanation:

• Function Definition:
• A function named test is defined, which takes one parameter:
• $nums: an array of numbers.
• Return Condition:
• The function checks two conditions:
• The array has exactly two elements (sizeof($nums) == 2).
• Either:
• Both elements are 10 ($nums[0] == 10 && $nums[1] == 10), or
• Both elements are 20 ($nums[0] == 20 && $nums[1] == 20).
• The function returns true if both conditions are met; otherwise, it returns false.

Output:

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

Flowchart:

PHP Code Editor:

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