Editing Entry point (section)

===FORTRAN===
[[FORTRAN]] does not have a main subroutine or function. Instead a <code>PROGRAM</code> statement as the first line can be used to specify that a program unit is a main program, as shown below. The <code>PROGRAM</code> statement cannot be used for recursive calls.<ref>XL FORTRAN for [[AIX]]. Language Reference. Third Edition, 1994. [[IBM]]</ref>

<syntaxhighlight lang="fortran">
      PROGRAM HELLO
      PRINT *, "Cint!"
      END PROGRAM HELLO
</syntaxhighlight>

Some versions of Fortran, such as those on the [[IBM System/360]] and successor mainframes, do not support the PROGRAM statement. Many compilers from other software manufacturers will allow a fortran program to be compiled without a PROGRAM statement. In these cases, whatever module that has any non-comment statement where no SUBROUTINE, FUNCTION or BLOCK DATA statement occurs, is considered to be the Main program.