WebDev/SumAver.html at main · TheRealJishnu/WebDev · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JishnuSum</title>
</head>
<body>
    <h2>Welcome to Sum and Average WebPage version j.1</h2>
    <input type="button" onclick="action()" value="Click Me">

    <script>
        function action(){
            let sum = 0;
            let flg = 1, n;
            do{
                n = Number(prompt("Enter Number of Inputs: "));
                if(n > 0 && !isNaN(n)) flg = 0;
                if(flg) alert("Length should be a Positive Integer")
            }while(flg);
            for(let i=0; i < n; i++) {
                let x = Number(prompt("Enter number to Add : "));
                if(isNaN(x)){
                    alert("This is not a Number")
                    i--;
                }
                else if((x%10)){
                    alert("This number is not terminated by zero");
                    i--;
                }
                else if(x <= 0){
                    prompt("This Number is Not a Positive Number");
                    i--;
                }
                else{
                    sum += x;
                }
            }
            let av = sum/n;
            alert("Sum is : " + sum + "\n");
            alert("Average is : " + av + "\n");
        }

    </script>
</body>
</html>