How do I calculate this?

1 
[
{
    "id": 97,
    "product": {
      "price": 200.0
    },
    "qty": 1.0
  },
  {
    "id": 98,
    "product": {
      "price": 200.0
    },
    "qty": 1.0
  },
  {
    "id": 104,
    "product": {
      "price": 500.0
    },
    "qty": 1.0
  },
  {
    "id": 105,
    "product": {
      "price": 500.0
    },
    "qty": 2.0
  }
]

I need to calculate the total of Product.Price * Qty for each object and then calculate the summation.
I tried but unable to do it. Please help

2

You’re moving in the right direction with this line.
You’ve got an array of objects.
[{obj}, {obj2}]
You’ll need to know two things:

  • How do you go through each element in an array?
  • How do you access the value of an object key/property?

Think on those, and you should find the answer you’re looking for. If you need more direction, let us know. :slight_smile:

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3
  • Find a way to iterate the array
  • For each item, multiply the object’s product price by the object’s qty
  • Now, for each of those multiplications, add them all together.

There’s two primary ways you can do this:

  1. A for loop with a total variable to which you keep adding the results of each multiplication.
  2. Using an array method that does this in an abstract way, it’s called reduce.
1 Like
4

I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

Please use the “preformatted text” tool in the editor (</>) to add backticks around text.

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See this post to find the backtick on your keyboard.
Note: Backticks are not single quotes.

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5

Thank you so much @luishendrix92 and @ilenia