Hyper text markup language
Yes, you are able to use HTML forms on a WordPress site without a plugin. When you are editing whatever post or page you are making the form on, switch to HTML view from WYSIWIG Editor. Then, simply use the regular tags you use to create forms on an HTML document.
Forms in HTML could be created very easily. They can be used by <form> tag predefined in HTML.
Yes HTML pages can be converted into other formats. You need to use jQuery and JavaScript for that purpose.
You can use a WYSIWYG html editor to drag and drop html form controls and program their function. An html editor such as Microsoft Front Page or Adobe DreamWeaver can do these tasks.
You can't use PHP in an HTML document, but you can use HTML in PHP script.
Buttons can be used in HTML for the interactiveness. <button> tag can be used for placing buttons on web page.
Forms in HTML provide us an interactive way to fill details. There are various elements like textbox, radio's etc.
HTML is used to create forms. As it is not a programming language it cannot process the forms or make them do anything. So for example it can create a button but it cannot make something happen when you click it. To do that, you need a programming language. Javascript is a programming language that is used in HTML pages to do lots of things, including the processing of forms.
There are a number of elements that could be contained in the HTML forms. They can contain text fields, check boxes, option lists and buttons with submit functions.
http://www.w3schools.com/HTML/
The most commonly problem with HTML forms is their dependency on scripting languages. HTML forms are reliant on script to accomplish many common tasks such as marking controls as required, performing validations and calculations, displaying error messages, and managing dynamic layout. This dependency results in complex documents, which are expensive and time-consuming to maintain.
Some websites will not accept HTML code in their forms so that malicious users will not be able to hijack the site. Oftentimes, web forms encode HTML so that it is not actually HTML but just plain text. If a web form does not allow HTML then it is possible that it gives another way of editing the look of the text that the form accepts.