How did Prophet Muhammad keep himself clean without using soap?

 Am I useless as a programmer if I only know HTML and CSS?

If you only know HTML and CSS then, yes, you are useless as a programmer.

That’s because HTML and CSS aren’t programming languages.

HTML is a markup language, designed originally to format Web pages, then later to identify specific parts of Web page content.

CSS is a style language, designed to specify the appearance of HTML elements.

You can only become a programmer by learning one or more programming languages like C, C++, C#, Java, Python, JavaScript, and many, many, many others.

If you only know HTML and CSS, you can be a great Web designer, but not a programmer.