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module module1
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! Identity of a utility
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! ____________________________________________________________________
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character (len=*), parameter :: xyz = &
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"I am just a more or less long string."
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character (len=*), parameter :: zhlp = '( &
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&"This program is free software; you can redistribute it and/or modify"/&
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&"____________________________________________________________________")'
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integer:: n
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contains
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recursive subroutine sub1(x)
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integer,intent(inout):: x
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integer:: y
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y=0
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if (x<n) then
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x= x + 1
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y =x**2
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print *, 'x = ', x,', y = ', y
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call sub1(x)
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print *, 'x = ', x,', y = ', y
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end if
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end subroutine sub1
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end module module1
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program main
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use module1
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integer:: x = 0
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print *, 'Enter number of repeats'
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read (*,*) n
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call sub1(x)
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end program main
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