{"version":"1.0","author_name":"yachin29","description":"JavaScript\u3067\u4e71\u6570\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u306b\u306f\u300crandom\u95a2\u6570\u300d\u3092\u4f7f\u3044\u307e\u3059\u3002 \u899a\u3048\u308b\u30e1\u30bd\u30c3\u30c9 Math.random Math.random()\u306f\u30010\u301c0.9999...(1\u672a\u6e80)\u306e\u9593\u304b\u3089\u30011\u3064\u306e\u6570\u5024\u3092\u30e9\u30f3\u30c0\u30e0\u3067\u8fd4\u3059\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u30020\u306f\u542b\u307f\u307e\u3059\u304c\u30011\u306f\u542b\u307f\u307e\u305b\u3093\u3002 Math.round Math.floor()\u306f\u3001\u5c0f\u6570\u70b9\u4ee5\u4e0b\u3092\u56db\u6368\u4e94\u5165\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u6574\u6570\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u306b\u5229\u7528\u3057\u307e\u3059\u3002 Math.ceil Math.floor()\u306f\u3001\u5c0f\u6570\u70b9\u4ee5\u4e0b\u3092\u5207\u308a\u4e0a\u3052\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u30020.999\u306a\u30891\u30013.21\u306a\u30894\u3068\u3044\u3046\u6570\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002 Math.floor Math.floor()\u306f\u3001\u5c0f\u6570\u70b9\u4ee5\u4e0b\u3092\u5207\u308a\u6368\u3066\u2026","title":"random\u95a2\u6570","height":"190","published":"2025-06-13 01:49:31","provider_url":"https://hatena.blog","blog_title":"WEB\u30b5\u30a4\u30c8\u5236\u4f5c\u306e\u52c9\u5f37","blog_url":"https://yachin29.hatenablog.com/","type":"rich","author_url":"https://blog.hatena.ne.jp/yachin29/","url":"https://yachin29.hatenablog.com/entry/2016/04/11/014931","categories":["JavaScript","2025\u5e7404\u6708\u30af\u30e9\u30b9"],"image_url":null,"provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyachin29.hatenablog.com%2Fentry%2F2016%2F04%2F11%2F014931\" title=\"random\u95a2\u6570 - WEB\u30b5\u30a4\u30c8\u5236\u4f5c\u306e\u52c9\u5f37\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%"}