Index.html
<!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>
</head>
<body>
<center>
<button onclick="sum()">
Shown result
</button>
</center>
<script src="js/script.js"></script>
</body>
</html>
Script.js
const sum = () => {
let a = prompt("enter value for a")
let b = prompt("enter value for b")
let op = prompt("Enter the value for Operation (+ , -, /, *)")
// if (op == "+") {
// let result = parseInt(a) + parseInt(b)
// alert(result)
// }
// else if (op == "-") {
// let result = parseInt(a) - parseInt(b)
// alert(result)
// }
// else if (op == "*") {
// let result = parseInt(a) * parseInt(b)
// alert(result)
// }
// else if (op == "/") {
// let result = parseInt(a) / parseInt(b)
// alert(result)
// }
// else {
// alert("You Entered Wrong Oprator!")
// }
let result
switch (op) {
case "+":
result = parseInt(a) + parseInt(b)
alert(result)
break;
case "-":
result = parseInt(a) - parseInt(b)
alert(result)
break;
case "*":
result = parseInt(a) * parseInt(b)
alert(result)
break;
case "/":
result = parseInt(a) / parseInt(b)
alert(result)
break;
default:
alert("You Entered Wrong Oprator!")
break;
}
//OR
if (result >= 10 || result <= 20) {
console.log("vlaue is greater then 10")
}
// AND
else if (result >= 10 && result <= 20) {
console.log("vlaue is greater then 10")
}
else if(result != 21) {
}
//Not
let val = true
if (!val) { }
if (val != true) { }
}
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