Question

191

rated 0 times [ 193] [ 2] / answers: 1 / hits: 64066 / 13 Years ago, thu, july 28, 2011, 12:00:00

I have two arrays of equal length, and I need to multiply the corresponding (by index) values in each, and sum the results.

For example

var arr1 = [2,3,4,5];

var arr2 = [4,3,3,1];

would result in 34 (4*2+3*3+4*3+5*1).

What's the simplest to read way to write this?

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3 Years ago

answered 13 Years ago malkajillc · Accepted Answer

var sum = 0;

for(var i=0; i< arr1.length; i++) {

    sum += arr1[i]*arr2[i];

}