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program main
implicit none
integer :: i
! Loop 1
do i = 1, 2
print *,'In loop 1 i =', i
if (i < 2) exit
end do
print *,'After loop 1 i = ', i
if (i /= 1) error stop
! Loop 2
print *
do i = 1, 3
print *,'In loop 2 i = ', i
if (i < 2) then
print *, "if (i < 2) then"
else
exit
end if
end do
print *,'After loop 2 i = ', i
if (i /= 2) error stop
! Loop 3
print *
do i = 1, 6
print *,'In loop 3 i = ', i
if (i <= 4) then
if (i - 1 == 3) then
if (i - 1 == 2) exit
exit
end if
end if
end do
print *,'After loop 3 i = ', i
if (i /= 4) error stop
! Loop 4
print *
do i = 1, 6
print *,'In loop 4 i = ', i
if (i <= 4) then
if (i - 1 == 3) then
if (i - 1 == 2) exit
exit
else
print *, "i - 1 /= 3"
end if
end if
end do
print *,'After loop 4 i = ', i
if (i /= 4) error stop
end program
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