Under this I’m gonna explain you
all about the obvious topic in all programming languages. These things are very
important to understand the basics of any programming language and also to
understand what terms will use in that language.
The topic is all about Keywords
and Identifiers used in C language. First, I would like to explain what the
definition says about Keywords and Identifiers then I’ll go deep in that.
Keywords:
These are the words or terms used
in C programming language, or we can say the terms set by default in C language
compiler. The terms used in syntax of each program of C language.
Such as: - printf, scanf, int,
etc.
So, C language has its own set of
reserved terms as Keywords.
Each programming language has
restrictions that, programs can’t use those Keywords as names for other things
(such as: variables name, functions name etc).
The Keywords reserved in C
language are all in lowercase letters and we have to use them as it is given by
compiler.
The meanings of Keywords are
already defined in C libraries we can’t change or override their meanings.
Examples of Keywords used in
standard C programming language are: -
So, like these there are many
more Keywords in C language and we can use any of them as per our requirement
but we can’t use them for our variable names, function names or other
overriding use.
Identifiers: -
Identifiers mean what we use to
identify anything in our program. In C language Identifiers are the user-defined
words or terms used for identifying components in our programs. Such as, we use
names for variables and functions in our programs then, these names are the
Identifiers for the program or when we declare structures, enums, unions in C
language programs we have to give them labels or tags so, these tags and labels
are Identifiers for the program.
We can make Identifiers with some
rules:
Identifiers could have 52
uppercase and lowercase alphabetic characters, 10 digits, and ‘_’ underscore.
The restriction is only that, we
can make Identifiers only by starting with alphabetic character.
There is no restriction on length
of Identifiers but, for the safety of portability of program we should restrict
Identifiers in C language up to 31 characters.
Identifiers are case sensitive.
i.e; word and WORD are considered different.
No special characters, such as
semicolon, period, blank space, slash or comma are allowed for Identifiers.
2 comments
Akash is good in Coding . He always tries to solve problems in a simple sober way. He is very passionate to do complex programming and solving things in effective manner.
ReplyDeleteThanks Vikas you liked my blog, it's my pleasure to hear from your side.
DeleteIf you have any questions or suggestions, you are free to ask, i will appreciate that and, i will try my best...