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    The id element defines a unique id for an HTML .This HTML id value can be used with CSS and JavaScript to perform certain task. In CSS, to select an element with a specific id, write hash (#) character followed by the id of the element.

    HTML Id Example

    #paragraph {
        background-color: lightblue;
        color: black;
        text-align: center;
    <p id="paragraph">welcome to javameant</p>

    HTML Id in Javascript

    <!DOCTYPE html>
    <h1 id="myid">welcome to javameant</h1>
    <button onclick="result()">Change text</button>
    function result() {
        document.getElementById("myid").innerHTML = "see you soon";

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