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Learn how to use character entity references in XML and HTML documents, and see the list of predefined and custom entities for various scripts and symbols. Find out the differences between numeric and character entity references, and the formal public identifiers for HTML DTD entities subsets.
W3Schools is a freemium educational website for learning coding online, launched in 1998 by Refsnes Data in Norway. It offers courses, tutorials, templates, and a live editor for various web technologies, such as HTML, CSS, JavaScript, Python, and more.
HTML is the standard markup language for web pages, defined by the W3C and ISO. Learn about its origins, elements, tags, attributes, versions and related technologies such as CSS, JavaScript and HTML5.
Learn about the meaning and usage of HTTP response status codes, which indicate the server's response to a client's request. The codes are classified into five categories: 1xx, 2xx, 3xx, 4xx, and 5xx.
Learn how to turn off 2-step verification and receive a verification code to sign into your AOL account. You can use phone verification or authenticator app verification to add an extra security step.
The \n escape sequence allows for shorter code by specifying the newline in the string literal, and for faster runtime by eliminating the text formatting operation. Also, the compiler can map the escape sequence to a character encoding system other than ASCII and thus make the code more portable.
Code signing is the process of digitally signing executables and scripts to confirm the software author and guarantee the code integrity. Learn how code signing works, what benefits it provides, and how to use it in different platforms and scenarios.
Learn about C, a general-purpose programming language created by Dennis Ritchie in the 1970s and widely used for operating systems, device drivers, and embedded systems. C has low-level features, static typing, and cross-platform portability.