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  1. # your code goes here
  2. def isPrime(x)
  3. 	if(x<2) then
  4. 		return 0
  5. 	end
  6. 	for i in 2..(Math.sqrt(x)).to_i do
  7. 		if(i!=x) then
  8. 			if(x%i==0) then
  9. 				return 0
  10. 			end
  11. 		end
  12. 	end
  13. 	return 1
  14. end
  15. print("自然数を入力してください\n")
  16. a = gets.chomp.to_i
  17. print(a,"以下の素数は以下のとおりです\n")
  18. l="{ "
  19. for i in 2..a do
  20. 	if(isPrime(i)==1) then
  21. 		l<<i.to_s+","
  22. 	end
  23. end
  24. l.slice!(-1)
  25. l+=" }"
  26. print(l)
Success #stdin #stdout 0s 28688KB
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stdin
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100
stdout
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自然数を入力してください
100以下の素数は以下のとおりです
{ 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97 }
https://ideone.com/MFC9Sj
language:
Ruby (ruby 2.5.5)
created:
6 years ago
visibility:
public

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