JS String

<script type="text/javascript">

    //string declaration
    phrase1 = "He said \"Hello world\" "; //to write quotes into string use \
    phrase2 = 'Hello USA ';
    phrase3 = new String("Hello New York");

    document.write("<h3>Declaration</h3>");
    document.write("Phrase1: " + phrase1 + "<br />");
    document.write("Phrase2: " + phrase2 + "<br />");
    document.write("Phrase3: " + phrase3 + "<br />");
    document.write("Phrase1 + 2 + 3 : " + phrase1 + phrase2 + phrase3 + "<br />");


    document.write("<h3>Methods and properties</h3>");
    document.write("Phrase1 length: " + phrase1.length + "<br />");
    document.write("Phrase1 Upper Case: " + phrase1.toUpperCase() + "<br />");
    document.write("Phrase1 Lower Case: " + phrase1.toLowerCase() + "<br />");
    document.write("Phrase1 char at index 10: " + phrase1.charAt(10) + "<br />");
    document.write("Phrase1 index of \"el\": " + phrase1.indexOf("el") + "<br />");
    document.write("Phrase1 slice from index 9 to 15: " + phrase1.slice(9,15) + "<br />");
    document.write("Phrase1 replace Hello with Hi: " + phrase1.replace("Hello","Hi") + "<br />");

    array = phrase1.split(" "); //Split string and save to array

    document.write("<h3>Compare</h3>");
    phrase1 = "abcd";
    phrase2 = "Abcd";

    if (phrase1 == phrase2) {
        document.write(phrase1 + " and " + phrase2 + " are equal!" + "<br />");
    } else {
        document.write(phrase1 + " and " + phrase2 + " are NOT equal!" + "<br />");
    }

    phrase1 = "apple";
    phrase2 = "ball";

    if (phrase1 < phrase2) {
        document.write(phrase1 + " is less then " + phrase2 + "<br />");
    } else {
        document.write(phrase2 + " is less then " + pharse1);
    }
    </script>