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Short note in Symbolic constant and Deeclaration of variables.

 Symbolic Constant 

            Symbolic constant are the name given to constant values that can not be changed during the executions of the program like. Generally  these are defined with the help of # defined statements in the definition section of the program. 

            e.g        #include<stdio.h>

                         #include<conio.h>

                            #define PI    4.15

                main()

        {

            ___________

            ___________

        }

    Now in the execution wherever compiler will find the symbolic constant  PI in the statements it will replace PI with 4.15 automatically.

Declaration of variables :-

            A variables is used to hold data within your program. A variables represents a location in your computer's memory. You can put data into this location and retrieve data out of it. Every variables has two parts, a name and a data type.

  1. It defines the name of the variables.
  2. It defines the type of the variables (integer, real, character, etc).
  3. It gives the programmer a description of the variable

              int answer;                                 /* the result of our expression*/     

            The keyword int tells C that this variables contains an integer value.

            The variables name is answer.

            The semicolon (;) marks the end of the statement. 

            The comment is used to define this variables for the program.                                                                     


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