Variables

• Variable in C Programming is called as container to store the data.
• Variable name may have different data types to identify the type of value stored.
• Suppose we declare variable of type integer then it can store only integer values.
• Variable is considered as one of the building block of C Programming which is also called as identifier.
• A Variable is a name given to the memory location where the actual data is stored.

Following are the types of variable in C :

• Local Variables
• Global Variables

Local Variables

• Local Variable is Variable having Local Scope.
• Local Variable is accessible only from function or block in which it is declared.
• Local variable is given Higher Priority than the Global Variable.

Global Variables

• Global Variable is Variable that is Globally available.
• Scope of Global variable is throughout the program [ i.e in all functions including main() ]
• Global variable is also visible inside function , provided that it should not be re-declared with same name inside function because "High Priority is given to Local Variable than Global"
• Global variable can be accessed from any function.