Identifiers in C

User defined words in a C Program is called Identifiers.

  Identifiers are names given to variables and functions.

  for example :
int mark=50;
mark is a user defined word that is a Identifier .


Rules for defining Identifier in C Langauge

Identifiers are names given to variables and functions.

  Identifiers can be a sequence of letters, digits or underscore '_' characters.

  Identifier must not begin with a digit.

  Identifiers in C are Case sensitive. So Total, total and TOTAL are all different.

  Keywords can not be used as identifiers.

  Special characters are not allowed ( #, -, +, % ).

  Identifiers should improve the readability of the program by having meaningful names.

  Try to avoid using identifiers that begin with an underscore character.

Example of Identifiers


#include <stdio.h>
#include <conio.h>
void main()
{
clrscr();
int myvariable;
myvariable=45;
printf("value of my variable is %d",myvariable);
getch();
}
value of my variable is 45

In above example myvariable is a Identifier.

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