i-n-rule.f90

program in_rule

  implicit none ! uncomment this line to get rid of implicit I-N rule

  ! This program shows the i-n rule
  
  ! integer ( variable name starts with letter between I and N)
  i = 1
  print *,'i = ', i

  ! real (starting with all other letters)
  a = 3
  print *,'a = ', a

end program