[Proyecto] IMC calculator

<meta charset="utf-8">

<script type="text/javascript">

    //Print break
    function lineBreak() {
        document.write("<br>")
        document.write("<br>")
    };

    //Print phrase
    function prnt(phrase) {
        document.write("<big>" + phrase + "</big>");
        lineBreak();
    };

    //Calculate IMC
    function calcIMC(weight, height) {
        return (weight / (height * height)).toFixed(2);
    };

    //Defining input var
    var inptWeight = 0;
    var inptHeight = 0;
    var inptName = "";

    //User IMC
    prnt("<h3>Calculate your own IMC!</h3>");

    //Getting inputs
    inptName = prompt("What's your name?")
    inptWeight = prompt(inptName + ", what's your weight? (kg)")
    inptHeight = prompt(inptName + ", what's your height? (m)")


    //Printing result
    prnt(inptName + ", your IMC is: " + calcIMC(inptWeight, inptHeight))

    //IMC chart
    prnt("<img src='https://upload.wikimedia.org/wikipedia/commons/thumb/1/18/Body_mass_index_chart-es.svg/1200px-Body_mass_index_chart-es.svg.png' alt='imc chart' height='500'/>")

</script>