How to compare number to sum of numbers in JS (VUE)

Question

New to JS and VUE.

I have a variable numberOfItems in my data which has 10 as its value.

I need to compare if this value is equal to the sum of 5 different variables data

var numberOfItems = 10
var destinations = (this.campaign.shipments_ue + this.campaign.shipments_uk + this.campaign.shipments_islas + this.campaign.shipments_peninsula + this.campaign.shipments_international)

I get 22222 in destinations value instead of 10, what method should I use to sum them up so I can compare them?

Thanks!

atleast one of your 5 items is probably a string. If it treats all of them as string, then it adds up all the 2's to get a result of `22222` — Silvan Bregy, Feb 14 '22 at 16:34
Parse a string to number using `parseInt()` or `parseFloat()` — Silvan Bregy, Feb 14 '22 at 16:35
Does this answer your question? [Addition is not working in JavaScript](https://stackoverflow.com/questions/8377410/addition-is-not-working-in-javascript) — chevybow, Feb 14 '22 at 16:36

score 0 · Answer 1 · answered Feb 15 '22 at 04:44

Observation : Looks like you are adding a string instead of number.

If data type is string then it is resulting of concatenating strings not a number.

For Ex :

var num1 = '10', num2 = '20';
console.log(num1 + num2); // 1020 (Here both the variables are string)

num1 = 10;
console.log(num1 + num2); // 1020 (Here variable 1 is number but variable 2 is a string)

num2 = 20;
console.log(num1 + num2); // 30 (Here both the variables are number)

Now, As per your requirement. You can use parseInt() function which helps in parsing a string argument and returns an integer.

Demo :

var num1 = '10', num2 = '20';

console.log(parseInt(num1) + parseInt(num2));

How to compare number to sum of numbers in JS (VUE)

1 Answers1