lesson-7-exampleif

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JavaScript IF</title>
</head>
<body>
    <h1>Greet me</h1>
    <form>
        <label for="time">Enter the time:</label><br>
        <input type="number" name="time" id="hours" min="0" max="23" step="1" autofocus value="12">
        <span>:00</span>

        <br>
        <br>
        <!-- onclick call the funtion named "greetMe()" -->
        <input type="button" value="Geet me now!" onclick="greetMe()">
    </form>

    <h2 id="output"></h2>


    <script>

        // create function
        function greetMe() {

            var inHours = document.getElementById("hours").value;
            var answer = "Good ";

            // if statement: check hours and based on value proceed with relevant operation
            if( inHours < 12 ) { answer = answer + "morning!"; }
                else if ( inHours < 18 ) { answer = answer + "afternoon!" }
                    else { answer = answer + "evening!" }

            // if statement: check if the input value is in the range between 0 - 23 hours
            if ( inHours < 0 || inHours > 23 ) {
                var answer = "Input is incorect. The hours range is from 0 - 23.";
                document.getElementById("hours").value = 0;
            }

            document.getElementById("output").innerHTML = answer;


        }

    </script>


</body>
</html>