Tokens of C++ language

C++ Tokens:

• The C++ program can contain the individual units called the C++ tokens and have the following types.

1.    Keywords:

• It is pre- defined words in C++. (i.e., Fixed words for creating programs in C++)
• List of keywords in C++ language:

2.    Identifiers:

• Identifiers are user-defined words in c++ program such as variable name, function name, array name and etc.

3.    Constants:

• Its value is fixed in C++.
• But it can be change during it’s before execution.
• User can also create constant throw syntax.

Syntax:

Const data_type  variable_name  = value;

For example:

The pi(π) value is standard value i.e. 22/7 = 3.14.

4.    String:

• Strings are collections of characters or alphabets i.e. words
• It is used to display on the output screen for user understanding.

5.    Special symbols:

It has a special built-in meaning in the C++ language.

6.    Operators:

• An operator is a symbol that specifies an operation to be performed on the operands.
• Five kinds of operators, there are

                   1.      Arithmetic operators(+,-,*,/,%,++,--)

                   2.     Relational Operators (==,!=,<=,>=,<,>)

                   3.     Logical Operators (&&,||,!)

                   4.     Assignment Operators(=,+=,-=,*=,/=,%=)

                   5.     Conditional Operators (?:)

                      6.    Bitwise Operators(&,|,^,<<,>>)

Example program for C-Tokens

1. #include<iostream.h>
   #include<conio.h>
   void main()
   {
   const int a=5;
   const int b=10;
   int c;
   clrscr();
   c=a+b;
   cout<<"\n Addition of a and b value is: "<<c;
   getch();
   }

Explanations:

• Keywords - main,int,cout,clrscr,getch
• Identifiers - a,b,c
• Constants - a=5,b=10
• String- cout<<“\n Addition of a and b value is: <<c;
• Special symbols-(),{,},;,”
• Operators -=,+

Output:

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