Title description: There is 100 yuan in the account. If depositing money, add the amount of money you input and add the amount of money you deposited first, and then a balance prompt box will pop up; if you withdraw money, subtract the amount of money withdrawn, and then pop up a balance prompt box; if the balance is displayed, output the balance ;If you exit, pop up the exit message prompt box
<!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>Assignment 6</title>
</head>
<body>
<script>
var balance = 100; //Define the balance
var num = parseInt(prompt('Please enter the operation you want:\n1. Deposit money\n2. Withdraw money\n3. Display balance\n4. Exit')); //prompt the business to be handled
if (num == 1) { //Input is 1, handle deposit business
var balance1 = parseInt(prompt('Please enter the amount you want to deposit:'));
balance += balance1; //increase balance
alert('Your current balance is:' + balance);
} else if (num == 2) { //Input is 2, handle money withdrawal business
var balance2 = parseInt(prompt('The balance is 100 yuan, please enter the amount you want to withdraw:'));
balance -= balance2; //Reduce the balance
alert('Your current balance is:' + balance);
} else if (num == 3) { //Input is 3, handle balance inquiry business
alert('Your current balance is:' + balance);
} else if (num == 4) { //Input is 4, handle refund business
alert('The card has been withdrawn, please keep it');
}
</script>
</body>
</html>