Exit Sub from inner loop?

[PhilOfPerth]

Here's a small test I've just run, which runs a snippet that calls a sub 10000 times, and exits early each time:

Code: (Select All)

Screen 9
For runs = 1 To 100000 '                            run the prog 10000 imes
    Numbers:
    For num = 1 To 10
        Print num; '                               print numbers 1 to 10
    Next
    letters '                                      now call the letters sub
    Print
    Print "Run #"; runs; "finished": Print '      show how many runs completed
Next
Print: Print "The final run should yield the same result as the first:"
Print " 1  2  3  4  5  6  7  8  9  10 ABCDEFGHIJ"
Sub letters
    letrnum = 0
    While letrnum < 26 '                           repeat this loop 26 times
        letr$ = Chr$(letrnum + 65) '
        If letrnum = 10 Then Exit Sub '            Bail out early, after j
        Print letr$; '                             show letter A, then B etc until Z
        letrnum = letrnum + 1 '                    next letter
    Wend
    _Delay .1
End Sub

There was no change in the output, so I assume there was no corruption caused by the early exit. Is this a reasonable assumption?