While writing a big program or if the functions and subroutines need to be used in more than one program then the programmer use module. A module is like a complete package where a programmer can keep the functions, subroutines. A module basically splits the program into multiple files.

A module contains two parts-
  • a specification part for the statements declaration
  • a includes a section for the subroutine and the function definitions

This is the favorite interviewer question in Fortran interview questions.



module name
   [statement declarations]
   [contains [subroutine and function definitions] ]
end module [name]

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