The entity-decl-list names the entities being declared.
If clen is present, it specifies the CHARACTER length for that entity (overriding the length in the type-spec).
If dims is present, it specifies the DIMENSION attribute for that entity (overriding any DIMENSION clause).
In a type declaration statement, if the PARAMETER clause is present then value must be present: it specifies
the value of the parameter.
If the PARAMETER clause is not present, initialisation implies the SAVE attribute and specifies the initial value of
the variable.
In a component definition statement, if initialisation is present it specifies default initialisation for that
component.
This will set the initial value of the component to that value whenever a new variable of the type is created.
An initialisation is permitted to be a reference to the NULL intrinsic function if and only if the entity is a pointer, and this specifies that the pointer is initially disassociated.
Note that if the entity is allocatable, no initialisation is permitted (the initial state of all allocatable entities is unallocated).