Array of multiples - JavaScript

We are required to write a JavaScript function that takes in two numbers, say m and n, and it returns an array of first n multiples of m.

For example ? If the numbers are 4 and 6

Then the output should be ?

const output = [4, 8, 12, 16, 20, 24]

Example

Following is the code ?

const num1 = 4;
const num2 = 6;
const multiples = (num1, num2) => {
    const res = [];
    for(let i = num1; i 

Output

Following is the output in the console ?

[ 4, 8, 12, 16, 20, 24 ]


Alternative Method: Using Array.from()

We can also create the array of multiples using Array.from() with a mapping function:

const getMultiples = (m, n) => {
    return Array.from({length: n}, (_, index) => m * (index + 1));
};

console.log(getMultiples(4, 6));
console.log(getMultiples(3, 5));
console.log(getMultiples(7, 4));


[ 4, 8, 12, 16, 20, 24 ]
[ 3, 6, 9, 12, 15 ]
[ 7, 14, 21, 28 ]


How It Works

The first approach uses a for loop that starts from m and increments by m in each iteration until it reaches m * n. The second approach creates an array of length n and maps each index to its corresponding multiple.

Conclusion

Both methods effectively generate arrays of multiples. The for loop approach is more explicit, while Array.from() provides a more functional programming style solution.