How do i write a javascript that asks the user to input a number. The number is then passed into a function.?

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How do we write a javascript which asks a user to submit a number. The series is afterwards upheld in to a duty we write which contains a loop. The double back will double back a series we upheld in to a duty as well as imitation out a word “ha” which most times. For instance, if we entered 3, a duty would imitation out “ha ha ha”? Any assistance would be GREATLY appreciated!

One thought on “How do i write a javascript that asks the user to input a number. The number is then passed into a function.?”

  1. Here’s a couple of trivial alternatives that differ by how the user gives input…

    <html>
    <head>
    <style>
    #showHa { font-size: 1.5em; }
    </style>
    <script>
    // utility cover function
    function get(eid) {return document.getElementById( eid ); };
    // get user input and display math operations on it
    function showHa() {
    // try to evaluate as a number
    var num = parseInt( get( ‘num’ ).value );
    // if not a valid number, advise user and exit
    if (isNaN(num) || num <= 0) {
    alert( ‘not a valid positive integer’ );
    return;
    }
    // since we didn’t exit above, clear display and use number
    get( ‘showHa’ ).innerHTML = ”;
    for (var i = 0 ; i < num; i++) {
    get( ‘showHa’ ).innerHTML += ‘ha ‘;
    }
    }
    </script>
    </head>
    <body>
    <form>
    enter a positive integer: <input type="text" id="num" />
    <input type="button" value="click" onclick="showHa();" />
    </form>
    <p id="showHa"></p> <!– ha will go here –>
    </body>
    </html>

    <html>
    <head>
    <style>
    #showHa { font-size: 1.5em; }
    </style>
    <script>
    // utility cover function
    function get(eid) {return document.getElementById( eid ); };
    // get user input and display math operations on it
    function showHa(n) {
    // try to evaluate as a number
    var num = parseInt( n );
    // if not a valid number, advise user and exit
    if (isNaN(num) || num <= 0) {
    alert( ‘not a valid positive integer’ );
    return;
    }
    // since we didn’t exit above, clear display and use number
    get( ‘showHa’ ).innerHTML = ”;
    for (var i = 0 ; i < num; i++) {
    get( ‘showHa’ ).innerHTML += ‘ha ‘;
    }
    };
    function doHa() {
    showHa( prompt( ‘enter a positive integer’, ” ) );
    };
    window.onload = doHa;
    </script>
    </head>
    <body>
    <p id="showHa"></p> <!– ha will go here –>
    </body>
    </html>