Compiling vs. Interpreted vs. Bytecode

Compilation (example: C)

Create a source file (filename.c, etc)
Give a compiler the source file as input
```
  % gcc filename.c
```
The compiler generates an executable as the output file (a.out, etc)
End user runs the executable
```
 % ./a.out
```

Interpreted (example: Perl, php)

Create a source file (filename.pl, etc)
End user runs the file using the interpreter
```
  % perl filename.perl 
```

(Note: the php3 interpreter is part of the web server)

Bytecode (example: Java)

Create a source file (filename.java, etc)
Give a compiler the source file as input
```
  % javac filename.java 
```
The compiler generates a byte code file (filename.class, etc)
End user runs the bytecode through the Java virtual machine
```
 % java filename
```

mstrout@cs.ucsd.edu .... May 25, 2000