Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

PHP PHP Basics Unit Converter Manipulating Numbers

Justin Townsend
Justin Townsend
4,720 Points
Posted by Justin Townsend
Justin Townsend
4,720 Points

PHP adding to a variable

I am failing miserable at this!

index.php 
<?php

//Place your code below this comment
$integerOne = 1;
$integerTwo = 2;
$floatOne = 1.5;

$integerOne + 5;
?>

2 Answers

Jeffrey Howard
Jeffrey Howard
18,173 Points
Jeffrey Howard
Jeffrey Howard
18,173 Points

Hey Justin, you are almost there! The task is asking for us to add or subtract a number from the variables.

There are a few ways to approach this but continuing on from your code, you just have to finish it off by either using

$integerOne = $integerOne + 5;

or using short version

$integerOne += 5;

Both solutions are saying take 5 and add it to the variable $integerOne.

Take another look at the video on Arithmetic Operators, Alena does a great job on explaining the different ways to add to a variable. 

//Place your code below this comment
$integerOne = 1;
$integerTwo = 2;

$floatOne = 1.5;

$integerOne = $integerOne + 5;
$integerTwo = $integerTwo - 1;

or

$integerOne += 5;
$integerTwo -= 1;

Hope this helps and happy coding!