WebProgramming/javascript.html at main · kizoukun/WebProgramming · GitHub

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<!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>Document</title>
    <script type="text/javascript">
        document.writeln('<h1>Welcome to JavaScript Programming</h1>')
    </script>
    <style>
        #content {
            margin-top: 20px;
        }
    </style>
</head>
<body>

    <button type="button" id="alert" onclick="showAlert()">Alert</button>
    <button type="button" id="prompt" onclick="showPrompt()">Prompt</button>
    <button type="button" id="table" onclick="showTable()">Table</button>
    <button type="button" id="average" onclick="showAverage()">Average</button>
    <button type="button" id="whileLoopFont" onclick="whileLoopFont()">whileLoopFont</button>
    <button type="button" id="summing" onclick="summing()">Summing</button>
    <button type="button" id="CalculatingCompoundInterest" onclick="CalculatingCompoundInterest()">Calculating Compound Interest</button>
    <button type="button" id="breakLoop" onclick="breakLoop()">Break Loop</button>
    <button type="button" id="continueLoop" onclick="continueLoop()">Continue Loop</button>
    <div id="content">

    </div>
</body>
    <script>
        const content = document.getElementById("content");
        function showAlert() {
            window.alert("This an alert");
        }
        function showPrompt() {
            var firstNumber, secondNumber, number1, number2;
            while(isNaN(firstNumber)) {
                firstNumber = window.prompt("Input an number");
            }
            while(isNaN(secondNumber)) {
                secondNumber = window.prompt("Input second number");
            }
            var totalNumber = parseInt(firstNumber) + parseInt(secondNumber);
            content.innerHTML = totalNumber;
        }
        function showTable() {
            let showContent = "";
            var first = window.prompt("Enter fist integer", "0");
            var second = window.prompt("Enter second integer", "0");
            var number1 = parseInt(first);
            var number2 = parseInt(second);
            showContent += "<h1>Comparison Result </h1>";
            showContent += "<table border=\"1\" width=\"100%\"";
            if(number1 == number2) {
                showContent += "<tr><td>" + number1 + " == " + number2 + "</td></tr>"
            }
            if(number1 != number2) {
                showContent += "<tr><td>" + number1 +  " != " + number2 + "</td></tr>"
            }
            if(number1 < number2) {
                showContent += "<tr><td>" + number1 +  " < " + number2 + "</td></tr>"
            }
            if(number1 > number2) {
                showContent += "<tr><td>" + number1 +  " > " + number2 + "</td></tr>"
            }
            if(number1 <= number2) {
                showContent += "<tr><td>" + number1 + " <= " + number2 + "</td></tr>";
            }
            if(number1 >= number2) {
                showContent += "<tr><td>" + number1 +  ">=" + number2 + "</td></tr>";
            }
            showContent += "</table>"
            content.innerHTML = showContent;
        }
        function showAverage() {
            var total = 0;
            var gradeCounter = 0;
            var grade = window.prompt("Enter Integer Grade, -1 to quit", "0");
            var gradeValue = parseInt(grade);
            var total = 0;
            while(gradeValue != -1) {
                total += gradeValue;
                gradeCounter++;
                grade = window.prompt("Enter Integer Grade, -1 to quit", "0");
                gradeValue = parseInt(grade);
            }
            if(gradeCounter != 0) {
                var average = total / gradeCounter
                content.innerHTML = "<h1>Class Average is " + average + "</h1>"
            } else {
                content.innerHTML = "<h1>No Grade were entered</h1>"
            }
        }
        function whileLoopFont() {
            var showContent = "";
            var counter = 1;
            while(counter <= 7) {
                showContent += "<p style=\"font-size: " + counter + "ex\"> Font Size: " + counter + "</p>";
                ++counter;
            }
            content.innerHTML = showContent
        }
        function summing() {
            var sum = 0;
            for(var number = 2; number <= 100; number +=2 )
                sum += number;
            content.innerHTML = "Sum of even number is " + sum;
        }
        function CalculatingCompoundInterest() {
            var showContent = "";
            var amount, principal = "10000000.0", rate = ".05";
            showContent += "<table border='1' width='100%'>";
            showContent += "<thead><tr><th>Year</th><th>Amount on Deposit</th></tr></thead>";

            console.log(showContent);
            for(var year = 1; year <= 25; year++) {
                amount = principal * Math.pow(1.0 + rate, year);
                showContent += "<tbody><tr><td>" + year + "</td><td>" + (Math.round(amount * 100) / 100).toLocaleString() + "</td></tr>";
            }
            showContent += "</tbody></table>";
            content.innerHTML = showContent;

        }
        function breakLoop() {
            var showContent = "";
            for(var count = 1; count <= 10; count++) {
                if(count == 5)
                    break;
                showContent += "Count is: " + count + "<br>";
            }
            showContent += "Broke out of loop at count " + count + "<br>";
            content.innerHTML = showContent;
        }
        function continueLoop() {
            var showContent = "";
            for(var count = 1; count <= 10; count++) {
                if(count == 5)
                    continue;
                showContent += "Count is: " + count + "<br>";
            }
            content.innerHTML = showContent;
        }
    </script>
</html>