\u4e09\u9805\u6f14\u7b97\u5b50\u3068\u306f\u3001\u6761\u4ef6\u5f0f\u3092\u8a55\u4fa1\u3057\u3066\u305d\u306e\u7d50\u679c\u306b\u5fdc\u3058\u3066\u8fd4\u3059\u5024\u3092\u5909\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u6f14\u7b97\u5b50\u3067\u3001\u6761\u4ef6\u6f14\u7b97\u5b50\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n
if\u2026else\u306e\u4ee3\u308f\u308a\u306b\u6761\u4ef6\u5206\u5c90\u3092\u7c21\u5358\u306b\u8a18\u8ff0\u3067\u304d\u308b\u305f\u3081\u3001\u899a\u3048\u3066\u304a\u304f\u3068\u3068\u3066\u3082\u4fbf\u5229\u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u69d8\u3005\u306a\u4f7f\u7528\u4f8b\u3092\u4ea4\u3048\u3066\u89e3\u8aac\u3044\u305f\u3057\u307e\u3059\u3002<\/p>\n
\u76ee\u6b21<\/p>
\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u3001\u300c?\u300d\u3068\u300c:\u300d\u3092\u7528\u3044\u3066\u6761\u4ef6\u5f0f\u3068\u3001\u6761\u4ef6\u5f0f\u304c\u300ctrue\u306e\u6642\u306e\u5f0f\u300d\u3068\u300cfalse\u306e\u6642\u306e\u5f0f\u300d\u3092\u5206\u3051\u3066\u8a18\u8ff0\u3057\u307e\u3059\u3002\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u69cb\u6587\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n
\u6761\u4ef6\u5f0f?true\u306e\u6642\u306e\u5f0f:false\u306e\u6642\u306e\u5f0f<\/pre>\n\u6761\u4ef6\u5f0f\u304ctrue\u306e\u6642\u306f\u300ctrue\u306e\u6642\u306e\u5f0f\u300d\u3092\u8a55\u4fa1\u3057\u305f\u7d50\u679c\u3092\u3001false\u306e\u6642\u306f\u300cfalse\u306e\u6642\u306e\u5f0f\u300d\u3092\u8a55\u4fa1\u3057\u305f\u7d50\u679c\u3092\u8fd4\u3059\u3001\u3068\u3044\u3046\u30b7\u30f3\u30d7\u30eb\u306a\u69cb\u6587\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
\uff11-\uff11\uff0e\u4e09\u9805\u6f14\u7b97\u5b50\uff08\u6761\u4ef6\u6f14\u7b97\u5b50\uff09\u306e\u4f7f\u7528\u4f8b<\/strong><\/span><\/h3>\n
\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n
let age;\r\nlet message;\r\n\r\nage = 20;\r\nmessage = age >= 18 ? '\u6210\u4eba\u3067\u3059' : '\u672a\u6210\u5e74\u3067\u3059';\r\nconsole.log(message); \/\/ \u6210\u4eba\u3067\u3059\r\n\r\nage = 15;\r\nmessage = age >= 18 ? '\u6210\u4eba\u3067\u3059' : '\u672a\u6210\u5e74\u3067\u3059';\r\nconsole.log(message); \/\/ \u672a\u6210\u5e74\u3067\u3059<\/pre>\n\u300cage = 20\u300d\u306e\u6642\u306f\u6761\u4ef6\u5f0f\u300cage >= 18\u300d\u304c\u300ctrue\u300d\u3068\u306a\u308b\u305f\u3081\u300cmessage\u300d\u306b\u300c\u6210\u4eba\u3067\u3059\u300d\u304c\u4ee3\u5165\u3055\u308c\u3001\u300cage = 15\u300d\u306e\u6642\u306f\u6761\u4ef6\u5f0f\u300cage >= 18\u300d\u304c\u300cfalse\u300d\u3068\u306a\u308b\u305f\u3081\u300cmessage\u300d\u306b\u300c\u672a\u6210\u5e74\u3067\u3059\u300d\u304c\u4ee3\u5165\u3055\u308c\u307e\u3059\u3002\u3053\u3053\u3067if\u2026else\u3092\u7528\u3044\u305f\u69cb\u6587\u3068\u6bd4\u8f03\u3092\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4e0a\u8a18\u3092if\u2026else\u3092\u4f7f\u3063\u3066\u8a18\u8ff0\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
let age;\r\nlet message;\r\n\r\nage = 20;\r\nif (age >= 18) {\r\n message = '\u6210\u4eba\u3067\u3059';\r\n} else {\r\n message = '\u672a\u6210\u5e74\u3067\u3059';\r\n}\r\nconsole.log(message); \/\/ \u6210\u4eba\u3067\u3059\r\n\r\nage = 15;\r\nif (age >= 18) {\r\n message = '\u6210\u4eba\u3067\u3059';\r\n} else {\r\n message = '\u672a\u6210\u5e74\u3067\u3059';\r\n}\r\nconsole.log(message); \/\/ \u672a\u6210\u5e74\u3067\u3059<\/pre>\n\u4e00\u76ee\u77ad\u7136\u3067\u3059\u304cif\u2026else\u3092\u7528\u3044\u308b\u3068\u8907\u6570\u884c\u306b\u6e21\u3063\u3066\u3057\u307e\u3046\u51e6\u7406\u304c\u3001\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u30b7\u30f3\u30d7\u30eb\u306a\u8a18\u8ff0\u306b\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
\uff11-\uff12\uff0e<\/strong>\u4e09\u9805\u6f14\u7b97\u5b50\uff08\u6761\u4ef6\u6f14\u7b97\u5b50\uff09\u306e\u5fdc\u7528\u4f8b<\/strong><\/span><\/h3>\n
\u3053\u3053\u3067\u306f\u3001\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u5fdc\u7528\u4f8b\u3092\u69d8\u3005\u306a\u30d1\u30bf\u30fc\u30f3\u3054\u3068\u306b\u3054\u7d39\u4ecb\u3044\u305f\u3057\u307e\u3059\u3002<\/p>\n
\uff11-\uff12-\uff11\uff0e<\/strong>\u6761\u4ef6\u5f0f\u3092\u8907\u6570\u6307\u5b9a\u3059\u308b\u66f8\u304d\u65b9<\/strong><\/h4>\n
\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u300c\u6761\u4ef6\u5f0f\u300d\u306f\u300c&&\u300d\uff08AND\uff09\u3084\u300c||\u300d\uff08OR\uff09\u3092\u7528\u3044\u3066\u8907\u6570\u306e\u6761\u4ef6\u5f0f\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6761\u4ef6\u5f0f\u3092\u8907\u6570\u6307\u5b9a\u3059\u308b\u969b\u306f\u3001\u6761\u4ef6\u5f0f\u3092\u300c()\u300d \u3067\u56f2\u3063\u3066\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u30fb\u300c&&\u300d\uff08AND\uff09\u3092\u7528\u3044\u305f\u4f8b<\/span><\/strong><\/h5>\n
let score;\r\nlet message;\r\n\r\nscore = 60;\r\nmessage = (score >= 0 && score <= 100) ? `\u5f97\u70b9\uff1a${score}\u70b9` : 'score\u306f0\u301c100\u306e\u5024\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044';\r\nconsole.log(message); \/\/ \u5f97\u70b9\uff1a60\u70b9\r\n\r\nscore = -20;\r\nmessage = (score >= 0 && score <= 100) ? `\u5f97\u70b9\uff1a${score}\u70b9` : 'score\u306f0\u301c100\u306e\u5024\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044';\r\nconsole.log(message); \/\/ score\u306f0\u301c100\u306e\u5024\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044<\/pre>\n\u30fb\u300c||\u300d\uff08OR\uff09\u3092\u7528\u3044\u305f\u4f8b<\/span><\/strong><\/h5>\n
let age;\r\nlet occupation;\r\nlet message;\r\n\r\nage = 19;\r\noccupation = 'office worker';\r\nmessage = (age <= 20 || occupation === 'student') ? '3\u5272\u5f15' : '\u5b9a\u4fa1';\r\nconsole.log(message); \/\/ 3\u5272\u5f15\r\n\r\nage = 22;\r\noccupation = 'student';\r\nmessage = (age <= 20 || occupation === 'student') ? '3\u5272\u5f15' : '\u5b9a\u4fa1';\r\nconsole.log(message); \/\/ 3\u5272\u5f15\r\n\r\nage = 24;\r\noccupation = 'teacher';\r\nmessage = (age <= 20 || occupation === 'student') ? '3\u5272\u5f15' : '\u5b9a\u4fa1';\r\nconsole.log(message); \/\/ \u5b9a\u4fa1<\/pre>\n\uff11-\uff12-\uff12\uff0e<\/strong>\u5165\u308c\u5b50\u306b\u3059\u308b\u66f8\u304d\u65b9<\/strong><\/h4>\n
\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u5165\u308c\u5b50\u306b\u3057\u3066\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6761\u4ef6\u5f0f\u304ctrue\u306e\u6642\u306b\u3055\u3089\u306b\u6761\u4ef6\u4ed8\u3051\u3057\u305f\u308a\u3001\u6761\u4ef6\u5f0f\u304cfalse\u306e\u6642\u306b\u3055\u3089\u306b\u6761\u4ef6\u4ed8\u3051\u3057\u305f\u308a\u3001\u3068\u3044\u3063\u305f\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n
\u30fb\u6761\u4ef6\u5f0f\u304ctrue\u306e\u6642\u306b\u3055\u3089\u306b\u6761\u4ef6\u4ed8\u3051\u3092\u3059\u308b\u4f8b<\/span><\/strong><\/h5>\n
let score;\r\nlet rank;\r\n\r\nscore = 63;\r\nrank = score >= 60 ? score >= 70 ? score >= 80 ? score >= 90 ? 'S' : 'A' : 'B' : 'C' : 'F';\r\nconsole.log(rank); \/\/ C\r\n\r\nscore = 95;\r\nrank = score >= 60 ? score >= 70 ? score >= 80 ? score >= 90 ? 'S' : 'A' : 'B' : 'C' : 'F';\r\nconsole.log(rank); \/\/ S\r\n\r\nscore = 45;\r\nrank = score >= 60 ? score >= 70 ? score >= 80 ? score >= 90 ? 'S' : 'A' : 'B' : 'C' : 'F';\r\nconsole.log(rank); \/\/ F\r\n\r\n\/\/ \u5165\u308c\u5b50\u306e\u5f62\u3068\u3057\u3066\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\r\nrank = score >= 60 ?\r\n (\r\n score >= 70 ?\r\n (\r\n score >= 80 ?\r\n (score >= 90 ? 'S' : 'A')\r\n : 'B'\r\n )\r\n : 'C'\r\n )\r\n : 'F';<\/pre>\n\u30fb\u6761\u4ef6\u5f0f\u304cfalse\u306e\u6642\u306b\u3055\u3089\u306b\u6761\u4ef6\u4ed8\u3051\u3092\u3059\u308b\u4f8b<\/span><\/span><\/strong><\/h5>\n
let cloudCover;\r\nlet weather;\r\n\r\ncloudCover = 0;\r\nweather = cloudCover <= 1 ? '\u5feb\u6674' : cloudCover <= 8 ? '\u6674\u308c' : '\u66c7\u308a';\r\nconsole.log(weather); \/\/ \u5feb\u6674\r\n\r\ncloudCover = 6;\r\nweather = cloudCover <= 1 ? '\u5feb\u6674' : cloudCover <= 8 ? '\u6674\u308c' : '\u66c7\u308a';\r\nconsole.log(weather); \/\/ \u6674\u308c\r\n\r\ncloudCover = 10;\r\nweather = cloudCover <= 1 ? '\u5feb\u6674' : cloudCover <= 8 ? '\u6674\u308c' : '\u66c7\u308a';\r\nconsole.log(weather); \/\/ \u66c7\u308a\r\n\r\n\r\n\/\/ \u5165\u308c\u5b50\u306e\u5f62\u3068\u3057\u3066\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\r\nweather = cloudCover <= 1 ?\r\n '\u5feb\u6674'\r\n : (cloudCover <= 8 ? '\u6674\u308c' : '\u66c7\u308a');<\/pre>\n\uff11-\uff12-\uff13\uff0e\u51e6\u7406\u3092\u8907\u6570\u884c\u306b\u3059\u308b\u66f8\u304d\u65b9<\/strong><\/h4>\n
\u6761\u4ef6\u5f0f\u304ctrue\u306e\u6642\u306e\u51e6\u7406\u3084false\u306e\u6642\u306e\u51e6\u7406\u306f\u3001\u300c()\u300d\u3067\u56f2\u3063\u3066\u51e6\u7406\u3054\u3068\u306b\u300c,\u300d\u3067\u533a\u5207\u308b\u3053\u3068\u3067\u8907\u6570\u884c\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
const func = (age) => {\r\n let isAdult;\r\n age >= 20 ?\r\n (\r\n isAdult = true,\r\n console.log(isAdult),\r\n console.log('\u304a\u9152\u306e\u8cfc\u5165\u304c\u53ef\u80fd\u3067\u3059')\r\n ) : (\r\n isAdult = false,\r\n console.log(isAdult),\r\n console.log('\u304a\u9152\u306f\u8cfc\u5165\u3067\u304d\u307e\u305b\u3093')\r\n );\r\n}\r\n\r\nfunc(20); \/\/ true, \u304a\u9152\u306e\u8cfc\u5165\u304c\u53ef\u80fd\u3067\u3059\r\nfunc(18); \/\/ false, \u304a\u9152\u306f\u8cfc\u5165\u3067\u304d\u307e\u305b\u3093<\/pre>\n\uff12\uff0e\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u6ce8\u610f\u70b9<\/strong><\/span><\/h2>\n
\u4e09\u9805\u6f14\u7b97\u5b50\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u6ce8\u610f\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\uff12-\uff11\uff0e\u00a0<\/strong>\u8907\u96d1\u306a\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u8a18\u8ff0\u3057\u305f\u5834\u5408\u306e\u53ef\u8aad\u6027<\/strong><\/span><\/span><\/h3>\n
\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u6761\u4ef6\u5206\u5c90\u3092\u30b7\u30f3\u30d7\u30eb\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3068\u3044\u3046\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308b\u4e00\u65b9\u3067\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u640d\u306a\u3063\u3066\u3057\u307e\u3046\u3068\u3044\u3046\u30c7\u30e1\u30ea\u30c3\u30c8\u3082\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u300c1.2.2. \u5165\u308c\u5b50\u306b\u3059\u308b\u66f8\u304d\u65b9\u300d\u3084\u300c1.2.3. \u51e6\u7406\u3092\u8907\u6570\u884c\u306b\u3059\u308b\u66f8\u304d\u65b9\u300d\u3067\u89e3\u8aac\u3057\u305f\u3088\u3046\u306a\u30d1\u30bf\u30fc\u30f3\u3067\u306f\u3001\u30d1\u30c3\u3068\u898b\u3069\u306e\u3088\u3046\u306a\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u308b\u306e\u304b\u304c\u308f\u304b\u308a\u3065\u3089\u304f\u306a\u3063\u3066\u3057\u307e\u3046\u305f\u3081\u3001if\u2026else\u3092\u7528\u3044\u305f\u65b9\u304c\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3068\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\uff11-\uff12-\uff12\uff0e\u5165\u308c\u5b50\u306b\u3059\u308b\u66f8\u304d\u65b9\u3092\u66f8\u304d\u63db\u3048\u305f\u4f8b<\/h4>\n
let score;\r\nlet rank;\r\n\r\nscore = 63;\r\nif (score >= 90) {\r\n rank = 'S';\r\n} else if (score >= 80) {\r\n rank = 'A';\r\n} else if (score >= 70) {\r\n rank = 'B';\r\n} else if (score >= 60) {\r\n rank = 'C';\r\n} else {\r\n rank = 'F';\r\n}\r\n\r\nconsole.log(rank); \/\/ C<\/pre>\n\u300cscore\u304c90\u4ee5\u4e0a\u300d\u3067\u3042\u308c\u3070\u300crank = \u2018S\u2019\u300d\u3001\u300cscore\u304c80\u4ee5\u4e0a\u300d\u3067\u3042\u308c\u3070\u300crank = \u2018A\u2019\u300d\u3068\u3044\u3046\u3088\u3046\u306b\u76f4\u611f\u7684\u306b\u6349\u3048\u3084\u3059\u304f\u306a\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
\uff11-\uff12-\uff13\uff0e\u51e6\u7406\u3092\u8907\u6570\u884c\u306b\u3059\u308b\u66f8\u304d\u65b9<\/h4>\n
const func = (age) => {\r\n let isAdult;\r\n if (age >= 20) {\r\n isAdult = true;\r\n console.log(isAdult);\r\n console.log('\u304a\u9152\u306e\u8cfc\u5165\u304c\u53ef\u80fd\u3067\u3059');\r\n } else {\r\n isAdult = false;\r\n console.log(isAdult);\r\n console.log('\u304a\u9152\u306f\u8cfc\u5165\u3067\u304d\u307e\u305b\u3093');\r\n }\r\n}\r\n\r\nfunc(20); \/\/ true, \u304a\u9152\u306e\u8cfc\u5165\u304c\u53ef\u80fd\u3067\u3059\r\nfunc(18); \/\/ false, \u304a\u9152\u306f\u8cfc\u5165\u3067\u304d\u307e\u305b\u3093<\/pre>\n\u4e0a\u8a18\u306e\u3088\u3046\u306b\u4e09\u9805\u6f14\u7b97\u5b50\u3067if\u2026else\u3092\u7701\u7565\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u660e\u793a\u7684\u306bif\u2026else\u3092\u8a18\u8ff0\u3057\u3066\u3057\u307e\u3063\u305f\u65b9\u304c\u7406\u89e3\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u306b\u306a\u3063\u3066\u3044\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
\uff12-\uff12\uff0e<\/strong>falsy<\/strong>\u306a\u5024\u306e\u5224\u5b9a<\/strong><\/span><\/h3>\n
\u300c0\u300d\u3084\u300c\u201d\u201d<\/span>\uff08\u7a7a\u6587\u5b57\uff09\u300d\u306a\u3069\u3001Boolean\u95a2\u6570\u306a\u3069\u3092\u7528\u3044\u3066\u771f\u507d\u5024\u306b\u5909\u63db\u3057\u305f\u969b\u306bfalse\u3068\u306a\u308b\u5024\u3092\u300cfalsy\u306a\u5024\u300d\u3068\u8a00\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306bfalsy\u306a\u5024\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n
\n
- <\/span>false<\/span><\/li>\n
- <\/span>0<\/span><\/li>\n
- <\/span>\u201c\u201d\uff08\u7a7a\u6587\u5b57\uff09<\/li>\n
- <\/span>null<\/span><\/li>\n
- <\/span>undefined<\/span><\/li>\n
- NaN<\/li>\n<\/ul>\n
console.log(Boolean(false)); \/\/ false\r\nconsole.log(Boolean(0)); \/\/ false\r\nconsole.log(Boolean(\"\")); \/\/ false\r\nconsole.log(Boolean(null)); \/\/ false\r\nconsole.log(Boolean(undefined)); \/\/ false\r\nconsole.log(Boolean(NaN)); \/\/ false<\/pre>\n\u3053\u306efalsy\u306a\u5024\u306b\u3064\u3044\u3066\u7406\u89e3\u3092\u3057\u3066\u3044\u306a\u3044\u3068\u3001\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u8aa4\u3063\u3066\u8a18\u8ff0\u3057\u3066\u3057\u307e\u3046\u305f\u3081\u6ce8\u610f\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u4e0a\u8a18\u3092\u8e0f\u307e\u3048\u3066\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
const zero = 0;\r\nconst message = zero ? '\u5024\u306f0\u3067\u3059' : '\u5024\u306f0\u3067\u306f\u3042\u308a\u307e\u305b\u3093';\r\nconsole.log(message);<\/pre>\n\u3053\u306e\u6642\u3069\u3093\u306a\u7d50\u679c\u304c\u8868\u793a\u3055\u308c\u308b\u3067\u3057\u3087\u3046\u304b\uff1f\u7d50\u679c\u3068\u3057\u3066\u306f\u300c\u5024\u306f0\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u300d\u304c\u51fa\u529b\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u300czero = 0\u300d\u306e\u6642\u3092true\u3068\u3057\u3066\u300c\u5024\u306f0\u3067\u3059\u300d\u3092\u8868\u793a\u3057\u3088\u3046\u3068\u4e0a\u8a18\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u300czero\u300d\u306b\u4ee3\u5165\u3055\u308c\u305f\u300c0\u300d\u304cfalsy\u306a\u5024\u3067\u3042\u308b\u305f\u3081\u306b\u300cfalse\u306e\u6642\u306e\u5f0f\u300d\u304c\u5b9f\u884c\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n
\u300czero = 0\u300d\u306e\u6642\u3092true\u3068\u3057\u3066\u5b9f\u884c\u3055\u305b\u305f\u3044\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3092\u3059\u308b\u3068\u3001\u610f\u56f3\u901a\u308a\u306b\u52d5\u4f5c\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
const zero = 0;\r\nconst message = zero === 0 ? '\u5024\u306f0\u3067\u3059' : '\u5024\u306f0\u3067\u306f\u3042\u308a\u307e\u305b\u3093';\r\nconsole.log(message); \/\/ \u5024\u306f0\u3067\u3059<\/pre>\n\u300c\u201d\u201d<\/span>\uff08\u7a7a\u6587\u5b57\uff09\u300d\u3084\u300cundefined\u300d\u3092\u6761\u4ef6\u5f0f\u3067\u5224\u5b9a\u3057\u305f\u3044\u5834\u5408\u306b\u306f\u540c\u69d8\u306e\u6ce8\u610f\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
\uff13\uff0e\u307e\u3068\u3081<\/span><\/h2>\n
\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u6761\u4ef6\u5f0f\u3092\u30b7\u30f3\u30d7\u30eb\u306b\u8a18\u8ff0\u3059\u308b\u306e\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u640d\u306a\u308f\u308c\u3066\u3057\u307e\u3046\u5834\u5408\u3082\u3042\u308b\u305f\u3081\u3001\u72b6\u6cc1\u306b\u3088\u3063\u3066if\u2026else\u306a\u3069\u4ed6\u306e\u6761\u4ef6\u5206\u5c90\u306e\u8a18\u6cd5\u3068\u4f7f\u3044\u5206\u3051\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e09\u9805\u6f14\u7b97\u5b50\u3068\u306f\u3001\u6761\u4ef6\u5f0f\u3092\u8a55\u4fa1\u3057\u3066\u305d\u306e\u7d50\u679c\u306b\u5fdc\u3058\u3066\u8fd4\u3059\u5024\u3092\u5909\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u6f14\u7b97\u5b50\u3067\u3001\u6761\u4ef6\u6f14\u7b97\u5b50\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002 if\u2026else\u306e\u4ee3\u308f\u308a\u306b\u6761\u4ef6\u5206\u5c90\u3092\u7c21\u5358\u306b\u8a18\u8ff0\u3067\u304d\u308b\u305f\u3081\u3001\u899a\u3048\u3066\u304a\u304f\u3068\u3068\u3066\u3082\u4fbf\u5229\u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u4e09\u9805\u6f14\u7b97\u5b50\u306e […]<\/p>\n","protected":false},"author":25,"featured_media":4376,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[27],"acf":[],"_links":{"self":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/4374"}],"collection":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/comments?post=4374"}],"version-history":[{"count":6,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/4374\/revisions"}],"predecessor-version":[{"id":6253,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/4374\/revisions\/6253"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media\/4376"}],"wp:attachment":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media?parent=4374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/categories?post=4374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}