There's no need to preemptively save the result in a variable either. Without having to worry about the function being re-evaluated for every case. I think this fact needs a little bit more attention, so here's an example: The difference between a series of if statements and the switch statement is that the expression you're comparing with, is evaluated only once in a switch statement. This is listed in the documentation above, but it's a bit tucked away between the paragraphs. Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search ("Sistemas Embarcados, Processamento de Imagem") ("Comunicação de dados e redes, Multimédia") ("Motores de Combustão Interna, Vibração Mecânica") ("Fundamentos de Logica de Design, Microelectrônicos") ("Organização Computacional, Multimédia") ("Micro processadores, Teoria da Lógica de Programação") ("Sistemas Operacionais, Java, Estrutura de dados") In contrast to if-then and if-then-else statements, the Java switch statement has several execution paths. Programa java para demonstrar o uso do switch encadeado The Java switch case statement is a type of control-flow statement that allows the value of an expression or variable to change the control flow of program execution through a multi-way branch.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |