{"id":319,"date":"2023-01-18T14:08:17","date_gmt":"2023-01-18T14:08:17","guid":{"rendered":"https:\/\/aipsacademy.com\/blogs\/?p=319"},"modified":"2023-01-18T14:08:18","modified_gmt":"2023-01-18T14:08:18","slug":"tokens-in-c-programming-language","status":"publish","type":"post","link":"https:\/\/aipsacademy.com\/blogs\/2023\/01\/18\/tokens-in-c-programming-language\/","title":{"rendered":"Tokens in C++ Programming Language"},"content":{"rendered":"\n

The smallest individual unit of C++<\/a> program is called tokens.<\/p>\n\n\n\n

A C++ program is made up of various tokens.<\/p>\n\n\n\n

There are following types of tokens:<\/p>\n\n\n\n

  1. Keywords \/ Reserve words<\/li>
  2. Identifiers \/ Variables<\/li>
  3. Constants\/ Literals<\/li>
  4. Operators<\/a><\/li>
  5. Separators \/ Punctuators \/ special characters<\/li><\/ol>\n\n\n\n

    1.Keywords<\/strong><\/h4>\n\n\n\n

    Keywords have fixed meaning and these meaning can’t be changed.<\/p>\n\n\n\n

    Keywords are reserve words for the system, so these are also known as reserve words.<\/p>\n\n\n\n

    These are the special words that has special importance and significance.<\/p>\n\n\n\n

    There are 63 keywords<\/strong> in C++.<\/p>\n\n\n\n

    These can’t be used as user defined name like variable name, array name , function name, class name , etc…<\/p>\n\n\n\n

    Example : char, int , float, long, double, void , if , else, break, switch, for, while , do, class, struct, union , <\/p>\n\n\n\n

    2. Identifier<\/strong><\/h4>\n\n\n\n

    Meaningful variable name, array name, function name, class name, etc.. known as Identifier.<\/p>\n\n\n\n

    An identifier is a user defined word.<\/p>\n\n\n\n

    Variable:<\/strong>– it is a data name used to store data value.<\/p>\n\n\n\n

    it is like a container of data.<\/p>\n\n\n\n

    Rules for declaring variable<\/strong>:<\/p>\n\n\n\n

    • The variable name must begin with character without space but underscore is permitted.<\/li>
    • The variable name should not start with a digit.<\/li>
    • The variable name should not be a C++ keywords.<\/li>
    • The variable name may be a combination of uppercase and lowercase character.<\/li>
    • The length of variable may up to 31 characters.<\/li>
    • Special characters or symbols not allowed between variable name.<\/li><\/ul>\n\n\n\n

      3.Constant<\/strong> :- It refers to fixed value and the value can’t be changed during the program execution. <\/p>\n\n\n\n

      we use const<\/strong> keyword or #define<\/strong> for declaring constant.<\/p>\n\n\n\n

      Example<\/p>\n\n\n\n

      const float pi=3.14;<\/p>\n\n\n\n

      #define pi 3.14<\/p>\n\n\n\n

      There are two types of constants.<\/p>\n\n\n\n

      1. Numeric constant
        • a. Integer constant ex.. 5, -17,<\/li>
        • b. Real constant ex.. 12.6 , -18.5<\/li><\/ul><\/li>
        • Character constant
          • a. Single character ex.. ‘5’ ‘\u00c1’ <\/li>
          • b. String constant ex. “528” “Ram”<\/li><\/ul><\/li><\/ol>\n\n\n\n

            4. Operator<\/strong><\/h4>\n\n\n\n

            An operator is a symbol that represent operation between operands.<\/p>\n\n\n\n

            An operator is a symbol that perform operations(such as addition, subtraction,multiplication,division etc) on various data items(operands) to produce result.<\/p>\n\n\n\n

            C=a+b<\/p>\n\n\n\n

            Here a,b,c are operands, and + and = are operators<\/p>\n\n\n\n

            5. Separators<\/strong> :- These define structure of a program.<\/p>\n\n\n\n

            example {} ,[],(), etc<\/p>\n\n\n\n

            \n