Multiply all elements in array

Question

I couldn\'t find an example here what I\'m really looking for. I\'d like to multiply all array elements, so if an array contains [1,2,3] the sum would be 1*2*3=6; So far I\'

Answer 1

If you want to multiply some consecutive numbers like 1,2,3 then, then apply this code and enter the number in the console (arr)

let array = [];

function factorisation(arr) {
    for (let j = arr; j > 0; j--) {
        array.push(j);
    }
    return multiply();
}

function multiply() {
    var sum = 1;
    for (var i = 0; i < array.length; i++) {
        sum = sum * array[i];
    }
    return sum;
}

console.log(factorisation(5));
//5*4*3*2*1 = 120