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(Added Arturo implementation)
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Smallest n where n^2 - (n-1)^2 is > 1000 is: 501
Smallest n where n^2 - (n-1)^2 is > 1000 is: 501
</pre>
</pre>

=={{header|Arturo}}==

<lang rebol>i: 1
while ø [
if 1000 < (i*i)-(dec i)*(dec i)
-> break
i: i + 1
]
print i</lang>

{{out}}

<pre>501</pre>


=={{header|Asymptote}}==
=={{header|Asymptote}}==