Some JavaScript Special Scenarios

for (i = 0,j=0; i < 3, j < 2; i++,j++) {
    console.log(i+" "+j)
}

The answer is 0,0 and 1,1 only j<2 applies

function f(a) {
  var a;
  alert(a);
}

f(4);

The answer is 4, since variable in javascript only has local and global scope

Original source

    for (i = 0,j=0; i < 3, j < 2; i++,j++) {

        console.log(i+" "+j)

    }

The answer is 0,0 and 1,1

only `j<2` applies

    function f(a) {

      var a;

      alert(a);

    }

    f(4);

The answer is 4, since variable in javascript only has local and global scope