Product Sums

Question

Product Sums

I am facing a challenge with my array:

money(v, q)

[50, 2]
[20, 2]
[10, 2]
.
.
.
n

I have a specific calculation that I need to perform.

(money[0].v * money[0].q) + (money[1].v * money[1].q) + (money[n].v * money[n].q)

Can anyone provide assistance with this task?

I attempted to solve it using the following code snippet:

 for (i = 0; i > money.length; i++)
 {
 (money[i].v * money[i].q) + (money[i++].v * money[i++].q)
 }

However, I realized that there is a mathematical error in my approach and I am not sure how to correct it.

Your help would be greatly appreciated. Thank you.

javascript arrays multidimensional-array

Answer 1

Answer №1

It seems like the structure of your array is a bit unclear to me. Assuming it's an array of arrays similar to this example [ [50,2], [20,2], [10,2] ].

If my assumption is correct, you might want to consider utilizing the Array.prototype.reduce() method.

For more information, you can refer to: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce

const arrayOfArrays = [
  [50, 2],
  [20, 2],
  [10, 2]
];
const reduced = arrayOfArrays.reduce((a, c) => a + (c[0] * c[1]), 0);
console.log(`Total: ${reduced}`);

Answer 2

It seems like the structure of your array is a bit unclear to me. Assuming it's an array of arrays similar to this example [ [50,2], [20,2], [10,2] ].

If my assumption is correct, you might want to consider utilizing the Array.prototype.reduce() method.

For more information, you can refer to: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce

const arrayOfArrays = [
  [50, 2],
  [20, 2],
  [10, 2]
];
const reduced = arrayOfArrays.reduce((a, c) => a + (c[0] * c[1]), 0);
console.log(`Total: ${reduced}`);

Answer 3

Answer №2

let total = 0
for (let j = 0; j < payment.length; j++){
 total += payment[j].v * payment[j].q
 }

To calculate the total sum, a variable is initialized before the for loop. During each iteration of the loop, the product of v and q corresponding to the current index value is added to the total.

Answer 4

let total = 0
for (let j = 0; j < payment.length; j++){
 total += payment[j].v * payment[j].q
 }

To calculate the total sum, a variable is initialized before the for loop. During each iteration of the loop, the product of v and q corresponding to the current index value is added to the total.

Product Sums

Answer №1

Answer №2

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