Syntax error in web, calculator, computers...

A syntax error occurs when a user (or programmer) has put words in an order that a program does not understand.

• A syntax error while surfing the Web may be caused by a mistyped or inadvertently rearranged URL, making it incomprehensible to a web browser.
• In computer science a syntax error ( IPA: /ˈsɪntæks ɛrə(ɹ)/ ) refers to an error in the syntax of a sequence of characters or tokens that is intended to be written in a particular programming language.
• A syntax error may also occur when an invalid equation is entered into a calculator. This can be caused, for instance, by opening brackets without closing them, or less commonly, entering several decimal points in one number.