Basically c,c++, java compiled before executed.Compier takes the code and produces a machine efficient representation of it, usally optimized for runtime performance
Scripting languages such as javascript,vbscript are interpreted which means the browser runs each line of JS code as it gets to it. They place less importance on runtime performance and are more geared towards tasks like prototyping,interactive coding and flexibility But now browsers has found a middle ground -JS is compiled on the fly.giving both the advantage of compilation and interpretation
can start with a
- <$>
- <_>
- Not with any other special characters