add operator within a variable in a string

Question

how is it possible to use an add operator within a string. I have the following function:

var point_1_x = 50;
var point_2_y = 100;

array[0].animate({path:"M, "+point_1_x+", "+point_1_y+"", 5, '<>');}

but I want to use var point_1_x and add an integer to it. How would be the correct syntax to do this.

array[0].animate({path:"M, "+point_1_x+500+", "+point_1_y+"", 5, '<>');}

does not seem to work.

Cheers

@Kristiyan - There is no need for parseInt, here. He is trying to perform the operation inline and already has the integers. — Zachary Kniebel
– Zachary Kniebel, Commented Mar 28, 2014 at 20:44
@ZacharyKniebel, I know. But if he make other manipulations, which are not poste, this will prevent type conflict. — Kristiyan
– Kristiyan, Commented Mar 28, 2014 at 20:46
@Kristiyan - That will only prevent type conflicts if he has the numbers in string form already, which is not part of the OP. — Zachary Kniebel
– Zachary Kniebel, Commented Mar 28, 2014 at 20:48
It probably doesn't work because you've misnested brackets. The } needs to be inside the ). — Mike Samuel
– Mike Samuel, Commented Mar 28, 2014 at 22:09

DrLudwig3 · Accepted Answer · 2014-03-28 20:42:12Z

2

use brackets, then it should work:

array[0].animate({path:"M, "+ ( point_1_x+500 ) +", "+point_1_y+"", 5, '<>');

answered Mar 28, 2014 at 20:42

DrLudwig3

4215 silver badges17 bronze badges

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

Comments

Zachary Kniebel · Accepted Answer · 2014-03-28 20:48:55Z

1

Give the following a try:

array[0].animate({path:"M, " + (point_1_x + 500) + ", " + point_1_y, 5, '<>');

JavaScript is a string-based language, and it is not type safe. You can perform mathematical operations within a statement in which you are concatenating integers into a string by wrapping the operations in parenthesis.

Also note that you did not close the brace you opened before path:, so use the following:

array[0].animate({path:"M, " + (point_1_x + 500) + ", " + point_1_y, 5, '<>'});

edited Mar 28, 2014 at 20:48

answered Mar 28, 2014 at 20:42

Zachary Kniebel

4,8043 gold badges32 silver badges53 bronze badges

1 Comment

Zachary Kniebel Over a year ago

Glad to have helped :) Happy coding!

mpm · Accepted Answer · 2014-03-28 20:42:23Z

1

Use parentheses :

array[0].animate({path:"M, "+(point_1_x+500)+", "+point_1_y+"", 5, '<>');

answered Mar 28, 2014 at 20:42

mpm

20.2k7 gold badges52 silver badges56 bronze badges

Collectives™ on Stack Overflow

add operator within a variable in a string

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related