How do you add an array element(int) and an integer in Javascript

Question

I am trying to add an integer and an array element(also integer) but I seem to be concatenating them instead. How would I add the two together?

i = 0;
var1 = 0;
var2 = prompt("please enter 5 integers separated by commas");
   //1,2,3,4,5  
var2.split(',');
for (i=0;i<5;i++){
    var1 += var2[i];
}

EDIT: Apologies I forgot something that's probably very important. I'll add that now. added the prompt and the split.

You have edited the question with the correct answer.. Please re run & check. — loxxy
– loxxy, Commented Feb 17, 2016 at 3:02
Do you mean you want to add the integer to every element of the array? — Explosion Pills
– Explosion Pills, Commented Feb 17, 2016 at 3:03

Explosion Pills · Accepted Answer · 2016-02-17 03:06:46Z

1

var2.split(',') does not update var2. You would have to do var2 = var2.split(','). You can also use .reduce to sum the array instead of iterating over it with a for loop:

var1 += var2.split(',').map(Number).reduce((prev, next) => prev + next);

answered Feb 17, 2016 at 3:06

Explosion Pills

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Comments

brk · Accepted Answer · 2016-02-17 03:05:52Z

0

var2 was not an an array, which you have edited. Also instead of 5 put var2.length and declare a variable with var keyword

var i = 0;
var var1 = 0;
var var2 = [1,2,3,4,5,6];  

for (i=0;i<var2.length;i++){
    var1 += var2[i];
}

JSFIDDLE EXAMPLE

NOTE Original question got edited after this post

edited Feb 17, 2016 at 3:05

answered Feb 17, 2016 at 3:03

brk

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Comments

Arun P Johny · Accepted Answer · 2016-02-17 03:07:25Z

0

There are few problems in the script

i = 0;
var1 = 0;
var2 = prompt("please enter 5 integers separated by commas");
//1,2,3,4,5  
var array = var2.split(','); //need to iterate over the array
for (i = 0; i < array.length; i++) { //instead of hardcoded length go by the array length
  console.log(array[i])
  var1 += +array[i]; //or parseInt(var2[i])
}
alert(var1)

answered Feb 17, 2016 at 3:07

Arun P Johny

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