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Simple Ruby Primality Test
Nickster258
Nov 1st, 2016
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Ruby
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def
isPrime
(
n
)
return
true
if
n==
1
if
n
%
2==
0
return
true
if
n==
2
return
false
end
for
i
in
(
3
..
Math
.
sqrt
(
n
)
)
.
step
(
2
)
return
false
if
n
%
i==
0
end
return
true
end
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