Inspiring

Question

Adding variables in JS

Forum|Forum|10 years ago
August 11, 2016
1 reply
278 views

Hello,

Could someone please explain how to add three variable values in javascript for Captivate? I have 3 scoring variables called sc1 sc2 and sc3. I'd simply like to add them together and set this number into the variable "add_3"

Assuming all the scores are 100, the variable add_3 shows up as 100100100.

window.cpAPIInterface.setVariableValue("add_3", sc1+sc2+sc3);

Thanks!

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Inspiring

Somehow JavaScript is seeing your variables as string values rather than numbers.

Try this:

window.cpAPIInterface.setVariableValue("add_3", (sc1 + sc2 + sc3));

This links shows some examples of this issue, and recommended approaches:

math - Javascript sign concatenates instead of giving sum of variables - Stack Overflow

If that doesn't help, these references may be a little more basic:

JavaScript Tutorial - Lesson 4: JavaScript Operations on Variables

W3Schools have topic specific lessons:

JavaScript Operators

JavaScript Arithmetic

JavaScript Variables