Loops/Increment loop index within loop body: Difference between revisions
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(→{{header|Tcl}}: + standard ML) |
(→{{header|Ruby}}: Use prime standard library) |
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=={{header|Ruby}}== |
=={{header|Ruby}}== |
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<lang Ruby> |
<lang Ruby> |
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require 'prime' |
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def isPrime (nb) |
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return false if nb <= 1 |
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return nb == 2 if nb % 2 == 0 |
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i = 3 |
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while i * i < nb do |
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return false if nb % i == 0 |
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i += 2 |
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end |
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return true |
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end |
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limit = 42 |
limit = 42 |
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i = 42 |
i = 42 |
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n = 0 |
n = 0 |
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while n < limit do |
while n < limit do |
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if i.prime? then |
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n += 1 |
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puts "n = #{n}".ljust(7) + ":" + "#{i.to_s.reverse.scan(/\d{3}|.+/).join(",").reverse}".rjust(19) |
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i += i |
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else |
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i += 1 |
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end |
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end |
end |
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</lang> |
</lang> |
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