How to check if a checkbox is checked using jQuery?

Hi everyone! I just started learning jQuery and ran into a problem. I have a form with a checkbox, and I need to check if the checkbox is checked by the user when submitting the form. I tried several methods, but nothing works as I expected. Here's my HTML: ```html I agree to the terms Submit ``` And my jQuery code: ```javascript $('#submit').click(function() { if ($('#agree').val() == 'on') { alert('Checkbox is checked'); } else { alert('Checkbox is not checked'); } }); ``` When clicking the button, it always outputs "Checkbox is not checked", even if I check the box. I read that checkboxes have a `checked` property, but how do I get it via jQuery? I tried `$