what are bootstrap code example

Example 1: what is bootstrap

Bootstrap is a free and open-source CSS framework directed at responsive,
mobile-first front-end web development developed by TWITTER

It contains CSS- and JavaScript-based design templates for typography, forms,
buttons, navigation, and other interface components.

Example 2: what is bootstrap

Bootstrap is a CSS Framework developed at Twitter.
It aids in the rapid prototyping of Web Application styling.