Every variable fall into one of the four storage classes those are auto, extern, static and register.
These variables are local variables and system registers are allocated for these variables.Default value of the auto variable is 0.
This register type variables access time is less as the registers are internal to the CPU. Whe we are asigning the values
for register variable we should not use & operator. No other storage classes are not allowed with register
storage class.
Syntax of the Declaration of register variables:
register datatype variable name;