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Fortran / Memory and Pointers

Automatic arrays

Learn Automatic arrays in Fortran through a focused explanation, a dedicated topic-specific example, an engineering boundary, and a mastery check.

12 min read • Intermediate

Automatic arrays is a focused Fortran lesson inside Memory and Pointers. The example uses the construct named in the lesson directly rather than reusing a generic placeholder.

Trace the example from its inputs through Automatic arrays and identify the behavior that would change if that construct were removed or replaced. Pay attention to the language-specific rules shown by the syntax, because neighboring lessons intentionally exercise different mechanisms.

Topic-specific example

fortran-0058-452c3cfaf4.f90
fortran Try It Live 
program demo
  implicit none
  integer :: a(5) = [2,4,6,8,10]
  print *, a(2:4)
end program demo
print *, count([.true.,.false.,.true.])
print *, product([2,3,4])
print *, trim("Automatic arrays")
Edge case / engineering note

For Automatic arrays, test one realistic boundary: empty data, invalid input, unavailable resources, lifetime/cleanup, type constraints, or concurrency timing where applicable. A successful happy path is not enough to prove the construct is used correctly.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

Automatic arrays Mastery Check →
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