Fundamental Attributes of C Variable :

1. Name of a Variable
2. Value Inside Variable
3. Address of Variable
4. Size of a Variable
5. Type of a Variable

1.Name of Variable

• We can Give proper name to any Variable which is human readable.
• Compiler won’t understand this name , This is only for human understanding.
• Variable name is only the name given to the “Memory address”.
• Variable name maps into “Address inside” and then by considering mapped address compiler processes data.
• We have declared variable means “We have created one empty container which will hold data“.

2.Value inside Variable

• Depending on the type of Variable we can store any value of appropriate data type inside Variable.
• Suppose we have “Integer Variable” then Value inside variable will be of type “Integer“.
• Simple Variable can only hold one value at a time.

3.Address of Variable

• Variable can hold data ,it means there should be a container.
• So container must have Starting Address.
• Address of variable = Starting Address of Memory where Memory is allocated to Variable.

4.Type of Variable

• While declaring a variable we have to specify type of variable.
• Type of variable tells compiler that - “Allocate memory for data of Specified type“.
• If we declare variable of type Integer then compiler will allocate memory container of size 2 bytes and container will be able to store integer data only.

5.Size of Variable

• We can use sizeof operator to calculate size of any data type.

Variable attributes