Javascript Variable (Const , Let , Var) | Complete javascript series

 

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Complete Code : 

<script>

    // var x = 20;   

     

    // var   x = 30;

    // document.write(x)

    // const x = 20;

    //      x = 30;

    // document.write(x)

    // let x = 50

    //     x = 30

    // document.write(x)

    

    var x = 40;

    const y = 90;

    let z = 80

    document.write(window.x);

    document.write(window.y);

    document.write(window.z);

 // window is an object used to describe variable globally.

</script>