SIZEOF— Size in bytes of an expression
SIZEOF(X)calculates the number of bytes of storage the expression
N = SIZEOF(X)
|X||The argument shall be of any type, rank or shape.
POINTERattribute, the number of bytes of the storage area pointed to is returned. If the argument is of a derived type with
ALLOCATABLEcomponents, the return value does not account for the sizes of the data pointed to by these components. If the argument is polymorphic, the size according to the declared type is returned. The argument may not be a procedure or procedure pointer.
integer :: i real :: r, s(5) print *, (sizeof(s)/sizeof(r) == 5) end
The example will print
.TRUE. unless you are using a platform
REAL variables are unusually padded.