Calculate sum of all values given in a range in PHP

Question

How can I sum of all numbers within a number range using PHP?

For example:

1-5 (1+2+3+4+5) = 15

Do I need to use array_sum or a variation of array?

Answer 1

Yeah use array_sum() and range().

echo array_sum(range(1,5)); //"prints" 15

Demonstration

Answer 2

multiple options, here is 1.

$start=1;
$end=5;
$sum=0;
for ($i = $start; $i <= $end; $i++) {
$sum+=$i;
}

echo $sum;

Answer 3

Solution 1: Manually using loop

<?php
$startNum = 1;
$endNum = 5;
$sum = 0;
for($i = $startNum; $i <= $endNum; $i++){
  $sum = $sum + $i;
}
echo "Sum of given range is ".$sum;
?> 

Check code with result

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Solution 2: Using built-in functions

Function range() is used to take given range and function array_sum() used to calculate sum of given range/array.

<?php
    echo "Sum of given range is ".array_sum(range(1,5));
?> 

Check code with result