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Guess the outputs of the following codes:

// Code 1:

function func1(){

  setTimeout(()=>{

    console.log(x);

    console.log(y);

  },3000);

  var x = 2;

  let y = 12;

}

func1();

// Code 2:

function func2(){

  for(var i = 0; i < 3; i++){

    setTimeout(()=> console.log(i),2000);

}

}

func2();

// Code 3:

(function(){

  setTimeout(()=> console.log(1),2000);

  console.log(2);

  setTimeout(()=> console.log(3),0);

  console.log(4);

})();

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