Find squares n where n+1 is prime: Difference between revisions
→{{header|Ruby}}: Add Ruby
Drkameleon (talk | contribs) (added Arturo) |
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=={{header|Ruby}}==
<syntaxhighlight lang="ruby">require 'prime'
p (1..Integer.sqrt(1000)).filter_map{|n| sqr = n*n; sqr if (sqr+1).prime? }</syntaxhighlight>
{{out}}
<pre>
[1, 4, 16, 36, 100, 196, 256, 400, 576, 676]
</pre>
=={{header|Sidef}}==
<syntaxhighlight lang="ruby">1..1000.isqrt -> map { _**2 }.grep { is_prime(_+1) }.say</syntaxhighlight>
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