Pointer in c language

Pointer is a variable that store address of another variable but same type so that we can access data of  first (normal) variable. 

Situation: suppose a postman delivers letters in a city. He know where is address. Someday he is on leave. So What happen with delivery of letters. Post office appoint new postman temporary and he delivered letters for that day.

Conclusion: We must have second way to reach that address .

This mechanism is also applied with programming language. Where we have second way to access variables using pointer.

Q. question is how this is done ?

A. Simple as pointer definition it is used to store address of another variable. This phenomena we use to make second way to reach that address.

Task first  how pointer declared ?

                   datatype * variable name;

                 this declare a pointer variable.

Task second how to assign address to pointer of another variable ?

                 pointer variable= & normal variable;

     

                  using address of operator we assign address of normal variable to pointer.

Task third  how to access  value of normal variable using pointer ?

                  using  *pointer variable;

               above pattern tells the pointer that go it's stored address and access normal variable value. 

example

                  int i=10;

                  int  *ptr;

                  ptr=&i;

                  access value using *ptr;

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