{"published":"2023-10-30 15:53:45","author_name":"ushumpei","provider_name":"Hatena Blog","categories":[],"height":"190","blog_title":"ushumpei\u2019s blog","description":"Lean4 \u3092\u6570\u5b66\u306e\u8a3c\u660e\u4ee5\u5916\u3067\u4f7f\u3063\u3066\u307f\u305f\u3044\u6c17\u6301\u3061\u304c\u3042\u308a\u3001\u3057\u304b\u3057\u73fe\u5b9f\u306b\u3042\u308b\u8907\u96d1\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u691c\u8a3c\u3059\u308b\u65b9\u6cd5\u304c\u308f\u304b\u3063\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u3068\u308a\u3042\u3048\u305a FizzBuzz \u306e\u8a3c\u660e\u3092\u66f8\u3044\u3066\u307f\u307e\u3057\u305f\u3002 import Std def fizz_buzz : Nat \u2192 String := fun n => if n % 15 = 0 then \"FizzBuzz\" else if n % 3 = 0 then \"Fizz\" else if n % 5 = 0 then \"Buzz\" else toString n -- 15 \u306e\u500d\u6570\u3067 FizzBuzz \u306b\u306a\u308b\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b theorem fizz_buzz_mul\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fushumpei.hatenablog.com%2Fentry%2F2023%2F10%2F30%2F155345\" title=\"Lean4 \u5b66\u7fd210 - ushumpei\u2019s blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"Lean4 \u5b66\u7fd210","author_url":"https://blog.hatena.ne.jp/ushumpei/","image_url":null,"version":"1.0","blog_url":"https://ushumpei.hatenablog.com/","width":"100%","provider_url":"https://hatena.blog","url":"https://ushumpei.hatenablog.com/entry/2023/10/30/155345","type":"rich"}