How will I know whether a checkbox is checked in JQuery?

Checkboxes are used to select one or more options of a limited number of choices. If you want to check whether a checkbox is checked in jQuery, you can use the .prop() method or .is() method to get the value of the "checked" property. 
.prop() method: 
Here's an example:

if ($('#myCheckbox').prop('checked')) {

  // Checkbox is checked

} else {

  // Checkbox is not checked

}

In this example, #myCheckbox is the ID of the checkbox you want to check. The .prop() method gets the value of the "checked" property, which will be true if the checkbox is checked and false if it is not checked.

.is() method:

if ($('#myCheckbox').is(':checked')) {

  // Checkbox is checked

} else {

  // Checkbox is not checked

}

This works by checking if the checkbox matches the :checked selector.

Both of these methods will work, but the first method using .prop() is slightly faster and is generally preferred for checking the "checked" property of a checkbox.