Variable Declaration In C

Variables in C 

 How to declare the variable inside the C program?

 Video : https://goo.gl/lSzCth

Example:-

#include<stdio.h>

int main()

{

     int a;                            //variable declaration

     int b=2;                       // variable initialization

  //how to print these variables

   printf("variable a = %d",a);

   printf("variable b = %d",b);

return 0;

} 

What is variable declaration?

Ans: Only declaring the variable without initializing it in a program is called as variable declaration.

          OR

         Only declaring the variable without assigning the value ( like "int a" <=Declaration ) is called as variable declaration.

What is variable initialization?

Ans: The variable declared with initializing the value is called variable initialization.

OR

         The variable declared assigning value to it (like "int b=2" <=Initialization) is called variable initialization.

 How to write comment inside a C-program?

Ans: The commented portion will not give any error when compiling the program.

 There are two types of  writing  the comment inside the program:

         1. using //:

               using  '// '  we can only write comment on a particular line.

               example:- //this is the line

        

         2. using /* - */ :

               using ' /* - */'  we can comment the block of statements in the program.

               example:- 

                start of comment    /*  int a;

                                               printf("enter value of a") ; */   end of comment