PHP Exercises: Compute the sum of the elements of an given array of integers

Last update on May 28 2025 13:04:54 (UTC/GMT +8 hours)

89. Sum of Array Elements

Write a PHP program to compute the sum of the elements of an given array of integers.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that calculates the sum of the elements in the given array.
function test($a1)
{ 
    // Calculate the sum of the elements in the array.
    return $a1[0] + $a1[1] + $a1[2] + $a1[3] + $a1[4];
}

// Test the 'test' function with different arrays, then display the results
echo test([10, 20, 30, 40, 50]) . "\n";
echo test([10, 20, -30, -40, 50]) . "\n";
?>

Explanation:

Function Definition:

The function test is defined with one parameter:

$a1: an array of numbers.

Sum Calculation:

The function calculates the sum of the first five elements of the array $a1 using explicit indexing:

It returns the result of adding the elements: $a1[0], $a1[1], $a1[2], $a1[3], and $a1[4].

Output:

150
10

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to iterate over an array of integers and compute their total sum.
Write a PHP function to sum all elements of an array using a foreach loop without using built-in functions.
Write a PHP program to calculate the cumulative sum of array entries, handling both positive and negative numbers.
Write a PHP script to implement manual summation of array elements and output the final total.

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PHP Code Editor:

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