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Tristan Nederhoff
Courses Plus Student 2,221 PointsCalculation strings with integers
I have done the javascripts basics course before starting the PHP one. One major difference is in calculation. Example Javascript:
var number = "1"; var numberTwo = 1; var outcome = number + numberTwo;
Var outcome will be 11. in PHP
$number = "1"; $number_two = 1; $outcome = $number + $number_two;
$outcome will be 2.
What's the difference? Is it PHP settings in your server? What is the reason it does work in PHP and not in Javascript?
3 Answers
Christian Andersson
8,712 PointsSince one of your variables is a string and the other an integer, when you do
number + numberTwo
in javascript, you are actually concatenating the two variables because the plus-sign is the operator used for concatenation.
In php however, the period-sign is the concatenation operator while the plus-sign is the addition operator. So basically your + means two different things in javascript and php, hence why you get the different results.
Tristan Nederhoff
Courses Plus Student 2,221 PointsThank you!
Christian Andersson
8,712 PointsI should add that in javascript the +-sign is used both for concatenation and addition. If both variables are integers (or in another numeric type), it will add. But if there is a string in there, it will concatenate.
Oh, and mark the question as solved, if it is :)
Tristan Nederhoff
Courses Plus Student 2,221 Pointsi would like to mark it as solved, but can't quite figure out how.