How can I add 1 to "1" and come up with "2" in Javascript?

Question

I have some code here:

this.$state.transitionTo('questions.question', { testId: this.$qs.userTestId, cq: this.$qs.cq + 1 });
this.$state.transitionTo('questions.question', { testId: this.$qs.userTestId, cq: this.$qs.cq - 1 });

The value of this.$qs.cq is 1.

When my code runs for the first case instead of changing it to 2 it makes it into "11". How can I make it so it does a numeric addition (and subtraction for the seconds case)?

I did define in typescript:

cq: number;

but it doesn't seem to give an error

If `this.$qs.cq` is supposed to be a number you should use `parseInt()` when you assign a value to it, otherwise it's a string and `+` appends to it. — Ja͢ck, Oct 12 '14 at 08:16

score 2 · Accepted Answer · edited Oct 12 '14 at 09:37

2

Use:

pareseInt(this.$qs.cq,10) + parseInt(this.$qs.cq,10)

edited Oct 12 '14 at 09:37

Unihedron

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answered Oct 12 '14 at 08:20

Arindam Nayak

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2

That is the exact opposite of the correct answer. – JJJ Oct 12 '14 at 08:25
2

If you're going to suggest `parseInt`, I'd recommend specifying the second parameter to the function. [See why.](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt) – rink.attendant.6 Oct 12 '14 at 08:31
1

@rink.attendant.6 , thanks for suggestion, i have updated this. – Arindam Nayak Oct 12 '14 at 08:34

How can I add 1 to "1" and come up with "2" in Javascript?

1 Answers1