function myFunction(a) {

    console.log(a);

}

​

myFunction(12);

var x=21;

var myFunction = function(){

console.log(x);

var x= 20;

};

myFuntion();

var f = function () {

  x = x + "b";

  if (x.length > 100) {

    let x = "a";

  }

  console.log (x);

}

f ();

var x= 'hi';

function myfunction()

{

console.log(x);

var x = 'hello';

}

myfunction();