Fortran Getting started with Fortran Case insensitivity
Example
Uppercase and lowercase letters of the alphabet are equivalent in the Fortran character set. In other words, Fortran is case insensitive. This behavior is in contrast with case-sensitive languages, such as C++ and many others.
As a consequence, the variables a and A are the same variable. In principle one could write a program as follows
pROgrAm MYproGRaM
..
enD mYPrOgrAM
It's to the good programmer to avoid such ugly choices.
