Fortran 90 Features

Look and Feel

New, improved source format - no more 72 character limit

Variable declarations - more options and flexibility

Loops and Conditionals

New power for old do loops and if statements

Plus a case statement - clean up those ugly if-then-else chains

Dynamic memory allocation

Allocate what you need at run time - no more recompiling when you need larger arrays.

And pointers. Now you too can create linked lists and trees.

Array operations

Operate on arrays as easily as scalars

Derived data types

Do-it-yourself data types - similar to C structures

Overloaded operators

Add even more power to derived data types

Modules

Combine data and subprograms in one chunk. Great for global data, private data, simple object oriented programming, and more.

Here's a partial list of intrinsic functions and subroutines.

One downside of all these great new features can be perfomance problems, particularly when passing dynamic arrays into subroutines.