How can I multiply an array elements between another array?

Question

I want to do it with the forEach loop but I can't do it, what I want to do is the following

For example i have the first array:

let numbersA = [4,5,6,7,8];

Then i have the last array:

let numbersB = [2,3,4,5,6];

The expected output:

4 * 2 = 8

4*3 = 12

4 * 4 = 16

4 * 5 = 20

4 * 6 = 24

and now comes the second multiplication of the first array of the second number:

5 * 2 = 10

5 * 3 = 15

5 * 4 = 20

5 * 5 = 25

5 * 6 = 30

How can I get this result, I want to do it with the forEach loop, using arrow functions but I got stuck

I got stuck with forEach loop because I don't know if I have to do a loop or two to do the multiplications @TusharShahi — Frank
– Frank, Commented Mar 12, 2022 at 16:39
It might look like bad code, but just use two nested for loops. You can do the exact same thing with .forEach() too, but that can cause problems in some rare senarios. If you absolutely need to use .forEach(), then try array1.forEach(item1 => array2.forEach(item2 => doSomething(item1 * item2))) — Taureon
– Taureon, Commented Mar 12, 2022 at 16:43

Igor · Accepted Answer · 2022-03-12 16:38:23Z

1

let numbersA = [4,5,6,7,8];
let numbersB = [2,3,4,5,6];
numbersA.forEach(a => numbersB.forEach(b => console.log(a * b)));

answered Mar 12, 2022 at 16:38

Igor

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1 Comment

Wais Kamal Over a year ago

Please consider adding some explanation. It would be very helpful for a beginner.

Sash Sinha · Accepted Answer · 2022-03-12 16:40:55Z

0

You could use Template Literals to print out the equation:

let numbersA = [4, 5, 6, 7, 8];
let numbersB = [2, 3, 4, 5, 6];
numbersA.forEach(a => {
    numbersB.forEach(b => console.log(`${a} * ${b} = ${a * b}`));
});

answered Mar 12, 2022 at 16:40

Sash Sinha

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Comments

Sadok Mhiri · Accepted Answer · 2022-03-12 16:41:14Z

0

You can do it like this using nested forEach:

numbersA.forEach((itemA) => {
   numbersB.forEach((itemB) => {
       console.log(itemA * itemB);
   });
});

answered Mar 12, 2022 at 16:41

Sadok Mhiri

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