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+Ftnchek (short for Fortran checker) is designed to detect certain
+errors in a Fortran program that a compiler usually does not. ftnchek
+is not primarily intended to detect syntax errors. Its purpose is to
+assist the user in finding semantic errors. Semantic errors are legal
+in the Fortran language but are wasteful or may cause incorrect
+operation. For example, variables which are never used may indicate
+some omission in the program; uninitialized variables contain garbage
+which may cause incorrect results to be calculated; and variables
+which are not declared may not have the intended type. ftnchek is
+intended to assist users in the debugging of their Fortran program.
+It is not intended to catch all syntax errors. This is the function
+of the compiler. Prior to using ftnchek, the user should verify that
+the program compiles correctly.