File size: 224 Bytes
497f2f3 | 1 2 3 4 5 6 7 8 9 10 | @echo off
setlocal enableDelayedExpansion
set /a square=1, incr=3
for /l %%d in (1 1 100) do (
if %%d neq !square! (echo door %%d is closed) else (
echo door %%d is open
set /a square+=incr, incr+=2
)
)
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