Storage Class in C

Storage class is a concept In C which provides information about the variable's visibility ,lifetime and scope.

Storage class tells about the following things of variable.
i) Scope of variable
ii) Initial value of variable
iii) Storage location of variable
iv) Life span of variable

Types of storage class:-

i) Automatic variables
ii) External variables
iii) Static variable
iv)  Register variable

Different types of storage class are explained in the table given below:-

Properties/Types	Auto	Register	Extern	Static
storage	Memory	CPU register	Memory	Memory
Default initial value	Garbage value	Garbage Value	0(zero)	0(zero)
scope	Only within the block it is defined	Only to the block it is defined	Within whole program	Only within the block it is defined
Life	Till control remains within block in which variable is defined	Same as auto	As long as program executes	Persist between different function call

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