Upside-down numbers: Difference between revisions

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m (→‎{{header|Quackery}}: tightened necessary)
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=={{header|Quackery}}==
=={{header|Quackery}}==


<syntaxhighlight lang="Quackery"> [ 1
<syntaxhighlight lang="Quackery"> [ 0
[ 2dup > while
[ 2dup > while
2 / 1+ 18 * 1+
1 ^ 9 * 1+
again ]
again ]
nip ] is necessary ( n --> n )
nip ] is necessary ( n --> n )