Input hidden type is used to create nothing and show nothing to users.
<input type=hidden
/>
You can use hidden in forms and any where within an HTML document.
Input is unpair tag and output of hidden is hidden like you can see in above example.
Open notepad or any other text editor, follow the following points.
Send Hidden Data
save file with name task.html or task.htm and then open it using any browser and see results.
Don't forget input is empty element which means it always comes in single not in pair.