Global var scope not applied in function

Question

The below function outputs undefined.

var x = 100;
function test() {
  if(false){
    var x = 130;
  }
  console.log(x);
}

test();

I was with the perception that, since the statement inside IF block is not executed X should display 100 since X value is declared globally.

If I comment the IF block then the global X value is taken.

Could someone explain the reason behind this.