Identifiers are name of variables, functions and arrays. These are user-defined names.
Identifier naming rules in C :
A.) First Character must be an alphabet (a-z or A-Z)
B.) Must consist of letters, digits or underscore.
C.) Cannot use reserved keywords
D.) Must not contain white spaces
int a123; Correct
int a 123; wrong
C programs are written using below tokens and syntax.
C Keywords are reserved words has some specific meanings. All C keywords must be written in lowercase.
List of C Keywords :
Next Page : C Identifier
Compiler: Compiler is a computer program which transforms source code written in one programming language into another language (generally binary code,machine code ).
C compiler: C compiler converts C program into a binary program. (e.q. C compiler on windows compiles a C program and creates executable .exe file. )
Compilers for various platform / OS :
GCC ( Gnu C compiler ) : A open source C compiler for linux and other operating systems. GCC comes with preinstalled in ubuntu and other linux distribution. For windows we can install cygwin and Ming.
CodeBlocks with mingw for windows
Microsoft Visual studio for Windows
Turbo C++ for windows.