how to get a form with a text input and a button in html code example

Example 1: input button html

The <input type="button"> defines a clickable button (mostly used with a JavaScript to activate a script).

Syntax
<input type="button">

A push button that activates a JavaScript when it is clicked:
<input type="button" value="Click me" onclick="msg()">

And there is also different kind of buttons are there
<input type="submit">
<input type="reset">
These buttons are mostly used in form processing concept.
where submit button is use to submit the form data and reset button is for to blank out the form fields.

Example 2: intput field submit button

<label for="fname">First name:</label><br>
  <input type="text" id="fname" name="fname"><br>