How do I extract even elements of an Array?

Question

var arr = [4, 5, 7, 8, 14, 45, 76];

function even(a) {
  var ar = [];

  for (var i = 0; i < a.length; i++) {
    ar.push(a[2 * i + 1]);
  }

  return ar;
}

ale         


        

Answer 1

You need to test the elements for evenness like this:

var arr = [4,5,7,8,14,45,76];

function even(a){
  var ar = [];

  for (var i=0; i

%2 is the modulo operator, it returns the remainder of integer division.