{"id":124159,"date":"2022-03-29T23:34:12","date_gmt":"2022-03-29T14:34:12","guid":{"rendered":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/?p=124159"},"modified":"2022-05-26T21:41:14","modified_gmt":"2022-05-26T12:41:14","slug":"javascript-conditionaloperator","status":"publish","type":"post","link":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/2022\/03\/javascript-conditionaloperator.html","title":{"rendered":"\u3010JavaScript\u306e\u57fa\u672c\u3011\u6761\u4ef6\u6f14\u7b97\u5b50\uff08\u4e09\u9805\u6f14\u7b97\u5b50\uff09"},"content":{"rendered":"

JavaScript\u306b\u306f\u3001\u6f14\u7b97\u5b50\u306e\u4e2d\u3067\u3082\u7279\u306b\u30e6\u30cb\u30fc\u30af\u306a\u6761\u4ef6\u6f14\u7b97\u5b50\u3068\u3044\u3046\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002
\nif...else<\/code>\u6587\u306e\u4ee3\u308f\u308a\u3068\u3057\u3066\u826f\u304f\u4f7f\u7528\u3055\u308c\u308b\u305f\u3081\u3001\u899a\u3048\u3066\u304a\u304f\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n

\u4eca\u56de\u306f\u3001\u6761\u4ef6\u6f14\u7b97\u5b50\u3068\u306f\u4f55\u304b\u3001\u307e\u305f\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\u6761\u4ef6\u6f14\u7b97\u5b50\uff08\u4e09\u9805\u6f14\u7b97\u5b50\uff09<\/h2>\n

\u6761\u4ef6\u6f14\u7b97\u5b50\u3068\u306f\u3001\u6761\u4ef6\u306b\u3088\u3063\u3066\u51e6\u7406\u3092\u5206\u3051\u308b\u6f14\u7b97\u5b50\u3067\u3059\u3002
\n\u4e00\u822c\u7684\u306a\u6761\u4ef6\u5206\u5c90\u3088\u308a\u3082\u7c21\u6f54\u306a\u8a18\u8ff0\u3067\u6e08\u3080\u305f\u3081\u3001if...else<\/code>\u6587\u306e\u4ee3\u308f\u308a\u306b\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u307e\u305f\u30013\u3064\u306e\u30aa\u30da\u30e9\u30f3\u30c9\u3092\u6271\u3046\u3053\u3068\u304b\u3089\u4e09\u9805\u76ee\u6f14\u7b97\u5b50\u3068\u3082\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\n
\u30aa\u30da\u30e9\u30f3\u30c9 \u6761\u4ef6\u6f14\u7b97\u5b50 \u30aa\u30da\u30e9\u30f3\u30c9 \u6761\u4ef6\u6f14\u7b97\u5b50 \u30aa\u30da\u30e9\u30f3\u30c9\r\n<\/code><\/pre>\n<\/div>\n
JavaScript\u306e\u591a\u304f\u306f\u3001\u5358\u9805\u6f14\u7b97\u5b50\u307e\u305f\u306f\u4e8c\u9805\u6f14\u7b97\u5b50\u3092\u6271\u3046\u305f\u3081\u3001\u6761\u4ef6\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9\u306f\u4ed6\u306e\u3082\u306e\u3088\u308a\u30e6\u30cb\u30fc\u30af\u3067\u3059\u3002<\/p>\n
\u6761\u4ef6\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9<\/h2>\n
\u6761\u4ef6\u6f14\u7b97\u5b50\u306f\u3001?<\/code>\u3068:<\/code>\u3092\u4f7f\u3063\u3066\u3001\u6761\u4ef6\u5f0f\u3068true\/false\u306e\u6642\u306e\u5f0f\u3092\u5206\u3051\u3066\u66f8\u304d\u307e\u3059\u3002
\n\u4ee5\u4e0b\u306f\u6761\u4ef6\u6f14\u7b97\u5b50\u306e\u69cb\u6587\u3067\u3059\u3002<\/p>\n
\n
\u6761\u4ef6\u5f0f ? true\u306e\u6642\u306e\u5f0f : false\u306e\u6642\u306e\u5f0f\r\n<\/code><\/pre>\n<\/div>\n
\u6761\u4ef6\u6f14\u7b97\u5b50\u306f\u3001\u6761\u4ef6\u5f0f\u3092\u8a55\u4fa1\u3057\u305f\u7d50\u679c\u304ctrue\u3067\u3042\u308c\u3070\u3001true\u306e\u6642\u306e\u5f0f\u3092\u8a55\u4fa1\u3057\u305f\u7d50\u679c\u3092\u8fd4\u3057\u307e\u3059\u3002
\n\u53cd\u5bfe\u306b\u3001\u6761\u4ef6\u5f0f\u3092\u8a55\u4fa1\u3057\u305f\u7d50\u679c\u304cfalse\u3067\u3042\u308c\u3070\u3001false\u306e\u6642\u306e\u5f0f\u3092\u8a55\u4fa1\u3057\u305f\u7d50\u679c\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
\n
\u6761\u4ef6\u5f0f\u3092\u8a55\u4fa1 \u2192 \u7d50\u679c\u304ctrue \u2192 true\u306e\u6642\u306e\u5f0f\u3092\u8a55\u4fa1 \u2192 \u7d50\u679c\u3092\u8fd4\u3059\r\n\u6761\u4ef6\u5f0f\u3092\u8a55\u4fa1 \u2192 \u7d50\u679c\u304cfalse \u2192 false\u306e\u6642\u306e\u5f0f\u3092\u8a55\u4fa1 \u2192 \u7d50\u679c\u3092\u8fd4\u3059\r\n<\/code><\/pre>\n<\/div>\n
\u4ee5\u4e0b\u306e\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002
\n\u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u306e\u7d50\u679c\u306b\u3088\u3063\u3066\u3001A\u307e\u305f\u306fB\u3092\u8fd4\u3059\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
\n
\/\/ \u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u304ctrue\u306e\u5834\u5408\r\nlet a = true ? \"A\" : \"B\";\r\nconsole.log(a); \/\/ \"A\"\r\n\r\n\/\/ \u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u304cfalse\u306e\u5834\u5408\r\nlet b = false ? \"A\" : \"B\";\r\nconsole.log(b); \/\/ \"B\"\r\n<\/code><\/pre>\n<\/div>\n
\u6761\u4ef6\u5f0f\u306f\u771f\u507d\u5024\u4ee5\u5916\u306e\u5024\u3082\u5165\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u3001true\u307e\u305f\u306ffalse\u3069\u3061\u3089\u306b\u5f53\u3066\u306f\u307e\u308b\u304b\u8a55\u4fa1\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\n
let age = 19;\r\n\r\nlet drink = (age >= 20) ? \"Beer\" : \"Orange Juice\";\r\nconsole.log(drink); \/\/ \"Orange Juice\"\r\n<\/code><\/pre>\n<\/div>\n
\u307e\u305a\u3001\u6761\u4ef6\u5f0f\u306b\u8a18\u8ff0\u3055\u308c\u3066\u3044\u308bage >= 20<\/code>\u3092\u8a55\u4fa1\u3057\u307e\u3059\u3002
\n\u5909\u6570age\u306b\u306f19\u304c\u4ee3\u5165\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u300c\u5e74\u9f62\u304c20\u6b73\u4ee5\u4e0a\u300d\u3068\u3044\u3046\u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u306ffalse\u3067\u3059\u3002
\n\u3088\u3063\u3066\u3001\u8fd4\u3055\u308c\u308b\u5024\u306f\"Orange Juice\"<\/code>\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u4e0a\u8a18\u306e\u4f8b\u3092if...else<\/code>\u6587\u3067\u66f8\u304d\u63db\u3048\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\n
let age = 19;\r\nlet drink;\r\n\r\nif (age >= 20) {\r\n  drink = \"Beer\";\r\n} else {\r\n  drink = \"Orange Juice\";\r\n}\r\n\r\nconsole.log(drink); \/\/ \"Orange Juice\"\r\n<\/code><\/pre>\n<\/div>\n
\u3053\u306e\u3088\u3046\u306b\u3001if\u6587\u3060\u3068\u8907\u6570\u884c\u306b\u3082\u306a\u308b\u6761\u4ef6\u51e6\u7406\u3092\u6761\u4ef6\u6f14\u7b97\u5b50\u3092\u7528\u3044\u308b\u3068\u7c21\u6f54\u306b\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u8907\u6570\u306e\u6761\u4ef6\u304c\u3042\u308b\u5834\u5408\u3084\u3001\u7d30\u304b\u304f\u51e6\u7406\u3092\u5206\u3051\u305f\u3044\u5834\u5408\u306b\u306f\u3001if\u6587\u306e\u65b9\u304c\u9069\u3057\u3066\u3044\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u307e\u3068\u3081<\/h2>\n
\u4eca\u56de\u306f\u3001\u6761\u4ef6\u6f14\u7b97\u5b50\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002<\/p>\n
\n
\/\/ \u30dd\u30a4\u30f3\u30c8\r\n* \u6761\u4ef6\u6f14\u7b97\u5b50\u306f\u3001\u6761\u4ef6\u306b\u3088\u3063\u3066\u51e6\u7406\u3092\u5206\u3051\u308b\u6f14\u7b97\u5b50\r\n*\u300c?\u300d\u3068\u300c:\u300d\u3092\u7528\u3044\u30663\u3064\u306e\u30aa\u30da\u30e9\u30f3\u30c9\u3092\u53d6\u308b\u3053\u3068\u304b\u3089\u4e09\u9805\u76ee\u6f14\u7b97\u5b50\u3068\u3082\u547c\u3070\u308c\u308b\r\n* \u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u304ctrue\u3067\u3042\u308c\u3070\u3001true\u306e\u6642\u306e\u5f0f\u3092\u8a55\u4fa1\u3059\u308b\r\n* \u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u304cfalse\u3067\u3042\u308c\u3070\u3001false\u306e\u6642\u306e\u5f0f\u3092\u8a55\u4fa1\u3059\u308b\r\n<\/code><\/pre>\n<\/div>\n
\u6761\u4ef6\u5206\u5c90\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u306f\u3001\u305c\u3072\u6761\u4ef6\u6f14\u7b97\u5b50\u3092\u53d6\u308a\u5165\u308c\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u6761\u4ef6\u6f14\u7b97\u5b50\uff08\u4e09\u9805\u6f14\u7b97\u5b50\uff09\u306e\u95a2\u9023\u8a18\u4e8b<\/h2>\n
\u30fb\u6761\u4ef6\u5206\u5c90 -if\u6587<\/strong><\/a>
\n\u30fb\u6bd4\u8f03\u6f14\u7b97\u5b50<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"JavaScript\u306b\u306f\u3001\u6f14\u7b97\u5b50\u306e\u4e2d\u3067\u3082\u7279\u306b\u30e6\u30cb\u30fc\u30af\u306a\u6761\u4ef6\u6f14\u7b97\u5b50\u3068\u3044\u3046\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002 if…else\u6587\u306e\u4ee3\u308f\u308a\u3068\u3057\u3066\u826f\u304f\u4f7f\u7528\u3055\u308c\u308b\u305f\u3081\u3001\u899a\u3048\u3066\u304a\u304f\u3068\u4fbf\u5229\u3067\u3059\u3002 \u4eca\u56de\u306f\u3001\u6761\u4ef6\u6f14\u7b97\u5b50\u3068\u306f\u4f55\u304b\u3001\u307e\u305f\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066 […]","protected":false},"author":1,"featured_media":130251,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[1142],"tags":[964],"class_list":["post-124159","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript-basic","tag-javascript"],"_links":{"self":[{"href":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/wp-json\/wp\/v2\/posts\/124159","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/wp-json\/wp\/v2\/comments?post=124159"}],"version-history":[{"count":0,"href":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/wp-json\/wp\/v2\/posts\/124159\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/wp-json\/wp\/v2\/media\/130251"}],"wp:attachment":[{"href":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/wp-json\/wp\/v2\/media?parent=124159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/wp-json\/wp\/v2\/categories?post=124159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/wp-json\/wp\/v2\/tags?post=124159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}