Variables?

So, you have learnt the structure for creating the C program, no here a term that stuck in mind -"Variables in C Language"
    Variable basically is a named location in system memory which contain some value or data.

5                       A

 

So here, you can see a variable named 'A' ,occupied a space in the memory with a value '5'. variable can changeable ,because as its name specify "vari-able" .So you can change the value anytime ,if you wish to change it.