Using For loop inside function - not returning all values

Question

I am having problems displaying the results of function calculateGrowth. As shown below, I would like to find the results for each day of a 10 day period. I used a for loop for obvious reasons. But when I try to display results, all I get back is one result.

function calculateGrowth(){
    $days = 0;
    $growth = 10;
    for($days = 0; $days < 10; $days++){
      $totalGrowth = $growth * pow(2, $days/10);
    }
    return $totalGrowth;
}

Current Output

18.6606598307

Desired Output

Day Growth
1 - result
. - result
. - result
10

Hanky Panky · Accepted Answer · 2014-06-05 16:19:20Z

2

$totalGrowth = $growth * pow(2, $days/10);

Should be

$totalGrowth[] = $growth * pow(2, $days/10);
            ^^

So that it becomes an array and contains all the values that you add to it, rather than being a string which gets overwritten on every iteration of the loop.

answered Jun 5, 2014 at 16:19

Hanky Panky

46.9k9 gold badges76 silver badges95 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

felipsmartins · Accepted Answer · 2014-06-05 20:16:32Z

1

It sounds like what you're trying to get this:

function calculateGrowth() {    
    list($days, $growth, $table) = array(range(1, 10), 10, array());

    foreach ($days as $day) {

      $table[$day] = $growth * pow(2, $day/10);
    }

    return $table;
}

edited Jun 5, 2014 at 20:16

answered Jun 5, 2014 at 16:26

felipsmartins

13.6k4 gold badges51 silver badges58 bronze badges

Comments

Raj · Accepted Answer · 2014-06-05 16:42:39Z

0

It is correct as your final loop is doing this

$totalGrowth = 10 * pow(2, 9/10)
$totalGrowth = 10*1.8660659830736;
$totalGrowth = 18.660659830736;

Edit : Removed last comment

edited Jun 5, 2014 at 16:42

answered Jun 5, 2014 at 16:30

Raj

9421 gold badge7 silver badges12 bronze badges

Collectives™ on Stack Overflow

Using For loop inside function - not returning all values

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related