what does value do in this code?

Question

<input type="checkbox" name="gender" value="1" /> Male <br />
<input type="checkbox" name="gender" value="2" /> Female <br />

without value this code is working fine, so why do I use value? one more thing is, nothing happening while I am changing the number of value.

Answer 1

The "value" is useful when you want user's choice.

For example:
$("input[name=gender]:checked").val() -> returns the value of your checkboxes!