Storage classes global:exist throughout lifetime of entire program and can be referenced anywhere. static:exist throughout lifetime of entire program but can only be referenced in the function (or module)in which they are declared. local:(also called automatic)exist only for the duration of a call to the routine in which they are declared;a new variable is created each time the routine is entered (and destroyed on exit). dynamic:variables that are created during program execution;usually represented by an address held in a variable of one of the above classes.Storage classes global: exist throughout lifetime of entire program and can be referenced anywhere. static: exist throughout lifetime of entire program but can only be referenced in the function (or module) in which they are declared. local: (also called automatic) exist only for the duration of a call to the routine in which they are declared; a new variable is created each time the routine is entered (and destroyed on exit). dynamic: variables that are created during program execution; usually represented by an address held in a variable of one of the above classes