Saturday, 12 April 2014


Tokens: Tokens are either keyword, identifier, constant, string or symbol which are used in C language programming.

For example:
printf(“Hello everyone”);
Here the tokens are:
1) printf
2) (
3) “
4) Hello everyone
5) ;

Use of Semicolons:
Semicolons are used as sentence terminators. Whenever the compiler see a semicolon, it takes the sentence preceding it as one complete instruction and first runs that command and then moves to next line.


Comments are added in C language program so as to improve the readability of a program. Adding comments make it easy for others as well as programmers who programmed it easy to spot which part of program performs which function.
Comments are added by adding prefix /* and suffix */

For example:

/* this is my first comment */
The comment portion does not participate in programming and are for helping/ marking purpose only.
Keywords are reserved words which have special functions defined in the program. These words cannot be used for some other purposes or as a constant.

Some of the example of keywords are:

Auto, else, long, switch, break, enum, register, typedef, case, extern, return, union, char, float, short, unsigned, const, for, signed, void, continue, goto, sizeof, volatile, default, if, static, while, do, int, struct, _Packed, double and many more.  

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