HTML/CSS
HTML/CSS is part of the Languages an aspiring frontend developer needs to learn. HTML, CSS and JavaScript makes up the Frontend development.
HTML meaning Hypertext Markup Language, is a language used for the structure of a web page.
The HTML element start with <> tag and ends with a </> (there must be a backslash in the ending) Moreso there are few HTMl elements that doesn't have an end tag E.G <img> , <br> e.t.c. The extension for saving a HTML file is .html e.g index.html.
CSS meaning Cascading Stylesheet defines the look of a webpage, CSS is used for styling a web page just like the name says. Extension used in saving a CSS file is .css e.g page.css CSS are written in curly braces {} and always ends with a semicolon. E.g body { background: white; }. The example above consists of the element body, the property which is background and the value which is color. This : differentiate the property from the value. E.g property:value Background:color.