what is the difference between HTML4 and HTML5?

HTML4 and HTML5 are both versions of HTML, the standard markup language used for creating web pages. Some of the key differences between HTML4 and HTML5 are:

HTML4:

• Does not support multimedia elements such as video and audio
• Does not have built-in support for vector graphics (SVG) and math formatting (MathML)
• Has limited support for form controls and client-side data storage

HTML5:

• Adds multimedia elements like audio, video, and canvas for 2D graphics
• Adds new form controls like date pickers and search fields
• Provides better semantic support with new elements like header, footer, nav, etc.
• Supports local storage, enabling web applications to store data locally on the user’s device
• Does not require plugins such as Flash to handle multimedia content

Overall, HTML5 represents a significant step forward in the evolution of HTML, offering new features and capabilities that make it easier to create and deliver rich and interactive web experiences.