Ulam spiral (for primes): Difference between revisions
Added Quackery.
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=={{header|Quackery}}==
<code>isprime</code> is defined at [[Primality by trial division#Quackery]].
<code>spiral</code> is defined at [[Spiral matrix#Quackery]].
<syntaxhighlight lang="Quackery"> [] 900 times
[ i 1+ isprime join ]
30 spiral
witheach
[ witheach
[ dip dup peek iff
[ say "[]" ]
else [ say " " ]
] cr ]
drop</syntaxhighlight>
{{out}}
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[] [] [] []
[] [] [] []
[] [] [] [] []
[] [] [] [] [] []
[] [] []
[] [] [] []
[] [] [] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] []
[] [] [] [] [] [] []
[] [] []
[] [] [] [] [] [] [] []
[] [] [] [] [] [] [] [] []
[] [] [] []
[] [] [][] [] [] [] [] []
[] [] [] []
[] []
[] [] [] [] [] [] [] [] []
[] [] [] [] [] [] []
[] []
[] [] [] [] []
[] [] [] []
[] [] [] []
[] [] [] [] []
[] [] [] [] [] [] []
[] [] [] []
[] [] [] [] [] []
[] [] []
[] [] [] [] []
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