"You will not need this knowledge very often but it is helpful to have a rough idea of what hexadecimal numbers are because they regularly come up in web development. Decimal numbers are based on the number ten: "10" means ten, "100" means one hundred (ten times ten), etc. They have the following digits (a number consists of one or more digits):0123456789 "
"Hexadecimal numbers are based on the number sixteen: "10" means sixteen, "100" means 256 (sixteen times sixteen), etc. They have the following digits: 0123456789ABCDEF We can even convert numbers from hexadecimal to decimal via JavaScript: If a number literal starts with Ox ( x stands for heXadecimal) then it is interpreted as a hexadecimal number: Why are hexadecimal numbers convenient in computing? Because the numerical range of four bits is 16: 2 × 2 × 2 × 2."
HTML is the language used to create web pages. Projects for hands-on learning are hosted in the GitHub repository learning-web-dev-code. Feedback can be provided via comments at the end of the page. Decimal numbers use base ten and digits 0–9. Hexadecimal numbers use base sixteen and digits 0–9 and A–F. JavaScript recognizes hexadecimal literals starting with 0x. Hexadecimal is convenient because four bits represent 16 values. File system concepts include directories (folders) and file paths with Unix examples, and directory names are often ended with a slash. Web addresses use schemes such as https://.
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