JavaScript addition / sum loop

Question

I'm trying to add the following but it keeps concatenating and returning a string.

    var nums = [1.99, 5.11, 2.99];

    var total = 0;

    nums.forEach(function(i) {
      total += parseFloat(i).toFixed(2);
    });

Yes, I need it to return / add it with the decimals. Unsure what to do

Answer 1

If you wanted a more functional approach, you could also use Array.reduce:

var nums = [1.99, 5.11, 2.99];
var sum = nums.reduce(function(prev, cur) {
  return prev + cur;
}, 0);

The last parameter 0, is an optional starting value.

Answer 2

If you aren't storing strings of floats, you don't need to use parseFloat(i), that parses a float from a string. You could rewrite this as:

var nums = [1.99, 5.11, 2.99];

var total = 0;

nums.forEach(function(i) {
  total += i;
});

var fixed = total.toFixed(2);
console.log(fixed);

or

var nums = [1.99, 5.11, 2.99];

var total = 0;

for(var i = 0; i < nums.length; i++){
  total += nums[i];
}

var fixed = total.toFixed(2);
console.log(fixed);