I'm trying to write a script that will allow a user to enter a year and then determine if the year is a leap year. I need to include a form with a single text box where the user can enter a year. I also need to display and alert dialog box to the user starting wherther the year entered is a standart year or a leap year. Can someone help me please?
Certainly! I can help you with that. To determine if a year is a leap year, you need to follow these rules:
1. Years that are divisible by 4 are leap years, except for:
2. Years that are divisible by 100 are not leap years, except for:
3. Years that are divisible by 400 are leap years.
Here's an example of how you can write a script using JavaScript to achieve this:
```html
<!-- HTML code -->
<form>
<label for="yearInput">Enter a year:</label>
<input type="number" id="yearInput">
<button type="button" onclick="checkLeapYear()">Check</button>
</form>
```
```javascript
// JavaScript code
function checkLeapYear() {
// Get the value entered by the user
const year = document.getElementById('yearInput').value;
// Check if the year is a leap year
if ((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0) {
alert(year + " is a leap year!");
} else {
alert(year + " is not a leap year.");
}
}
```
In the above code, we have an HTML form with a text box where the user can enter a year. When the user clicks the "Check" button, the `checkLeapYear()` function is called.
Inside the function, we get the value entered by the user and store it in the `year` variable. We then apply the rules for leap years using if-else statements. If the year meets the conditions, we display an alert saying it's a leap year; otherwise, we display an alert saying it's not a leap year.
You can save the HTML and JavaScript code in separate files or combine them into a single HTML file. Open the file in a web browser, and you should see the form and be able to check if a year is a leap year.