{"id":169592,"date":"2024-05-08T16:49:31","date_gmt":"2024-05-08T08:49:31","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/169592.html"},"modified":"2024-05-08T16:49:36","modified_gmt":"2024-05-08T08:49:36","slug":"javascript-%e9%87%8c%e6%9c%80%e5%a4%a7%e7%9a%84%e5%ae%89%e5%85%a8%e7%9a%84%e6%95%b4%e6%95%b0%e4%b8%ba%e4%bb%80%e4%b9%88%e6%98%af2%e7%9a%8453%e6%ac%a1%e6%96%b9%e5%87%8f%e4%b8%80","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/169592.html","title":{"rendered":"JavaScript \u91cc\u6700\u5927\u7684\u5b89\u5168\u7684\u6574\u6570\u4e3a\u4ec0\u4e48\u662f2\u768453\u6b21\u65b9\u51cf\u4e00"},"content":{"rendered":"

\"JavaScript<\/p>\n

\u5728JavaScript\u4e2d\uff0c\u6700\u5927\u7684\u5b89\u5168\u6574\u6570\u662f2\u768453\u6b21\u65b9\u51cf\u4e00\uff089,007,199,254,740,991\uff09<\/strong>\uff0c\u8fd9\u662f\u56e0\u4e3aJavaScript\u4f7f\u7528\u6d6e\u70b9\u6570\u8868\u793a\u6cd5<\/strong>\u6765\u5b58\u50a8\u6240\u6709\u7684\u6570\u5b57\u3001\u91c7\u7528IEEE 754\u6807\u51c6<\/strong>\u3001\u786e\u4fdd\u8ba1\u7b97\u7cbe\u5ea6<\/strong>\u548c\u907f\u514d\u6570\u503c\u8ba1\u7b97\u4e2d\u7684\u8bef\u5dee<\/strong>\u3002\u5176\u4e2d\uff0c\u91c7\u7528IEEE 754\u6807\u51c6\u7684\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u683c\u5f0f\uff0c\u610f\u5473\u7740\u6570\u503c\u5b58\u50a8\u572864\u4f4d\u4e8c\u8fdb\u5236\u4e2d\uff0c\u5176\u4e2d52\u4f4d\u7528\u4e8e\u5b58\u50a8\u5c3e\u6570\uff0c11\u4f4d\u7528\u4e8e\u5b58\u50a8\u6307\u6570\uff0c1\u4f4d\u7528\u4e8e\u7b26\u53f7\u3002\u7531\u4e8e\u5c3e\u6570\u90e8\u5206\u536052\u4f4d\uff0c\u52a0\u4e0a\u9690\u542b\u7684\u4e00\u4f4d\u6574\u6570\uff08\u6240\u6709\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u5728\u5c3e\u6570\u90e8\u5206\u9690\u542b\u4e00\u4e2a\u6700\u9ad8\u4f4d\u76841\uff09\uff0c\u5b9e\u9645\u4e0a\u53ef\u7528\u4e8e\u8868\u793a\u6574\u6570\u7684\u4f4d\u6570\u4e3a53\u4f4d\u3002\u8ba1\u7b97\u673a\u4f7f\u7528\u4e8c\u8fdb\u5236\u8868\u793a\u6570\u503c\uff0c\u800c\u6700\u5927\u768453\u4f4d\u4e8c\u8fdb\u5236\u6574\u6570\u521a\u597d\u662f2\u768453\u6b21\u65b9\u51cf\u4e00\uff0c\u8d85\u8fc7\u8fd9\u4e2a\u503c\u5219\u65e0\u6cd5\u4fdd\u8bc1\u6574\u6570\u7684\u7cbe\u786e\u8868\u793a\uff0c\u8fdb\u800c\u53ef\u80fd\u5bfc\u81f4\u8ba1\u7b97\u8bef\u5dee\u3002<\/p>\n<\/p>\n

\u4e00\u3001JAVASCRIPT \u4e2d\u7684\u6570\u5b57\u8868\u793a<\/h3>\n<\/p>\n

JavaScript \u5185\u90e8\uff0c\u6240\u6709\u6570\u5b57\u90fd\u662f\u4ee564\u4f4d\u6d6e\u70b9\u6570\u7684\u5f62\u5f0f\u5b58\u50a8\uff0c\u9075\u5faaIEEE 754\u6807\u51c6\u3002\u8fd9\u4e2a\u6807\u51c6\u89c4\u5b9a\u4e86\u5982\u4f55\u5728\u5185\u5b58\u4e2d\u8868\u793a\u6d6e\u70b9\u6570\uff0c\u5305\u62ec\u5206\u89e3\u4e3a\u4e09\u4e2a\u90e8\u5206\uff1a\u7b26\u53f7\u4f4d\u3001\u6307\u6570\u4f4d\u548c\u5c3e\u6570\uff08\u6216\u79f0\u4e3a\u6709\u6548\u6570\u5b57\u4f4d\uff09\u3002\u7b26\u53f7\u4f4d\u51b3\u5b9a\u4e86\u6570\u5b57\u7684\u6b63\u8d1f\uff0c\u6307\u6570\u4f4d\u548c\u5c3e\u6570\u5171\u540c\u51b3\u5b9a\u4e86\u6570\u5b57\u7684\u5927\u5c0f\u3002\u7531\u4e8e\u6307\u6570\u7684\u5b58\u5728\uff0c\u4f7f\u5f97\u6d6e\u70b9\u6570\u80fd\u591f\u8868\u793a\u975e\u5e38\u5927\u6216\u975e\u5e38\u5c0f\u7684\u6570\u503c\uff0c\u4f46\u662f\u8fd9\u4e5f\u610f\u5473\u7740\u5b83\u5fc5\u987b\u5728\u8868\u793a\u975e\u5e38\u7cbe\u786e\u503c\u548c\u975e\u5e38\u5927\u8303\u56f4\u503c\u4e4b\u95f4\u505a\u51fa\u53d6\u820d\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u4e3a\u4ec0\u4e48\u662f2\u768453\u6b21\u65b9\u51cf\u4e00<\/h3>\n<\/p>\n

\u8fd9\u4e0eJavaScript\u4e2d\u6570\u5b57\u7684\u5b58\u50a8\u683c\u5f0f\u5bc6\u5207\u76f8\u5173\u3002\u5728\u6240\u6709\u768464\u4f4d\u4e2d\uff0c\u67091\u4f4d\u662f\u7b26\u53f7\u4f4d\uff0c11\u4f4d\u662f\u6307\u6570\u4f4d\uff0c\u5269\u4e0b\u768452\u4f4d\u7528\u6765\u8868\u793a\u5c3e\u6570\u3002\u4f46\u5b9e\u9645\u4e0a\uff0c\u7531\u4e8e\u7f16\u7801\u7684\u65b9\u5f0f\uff0c\u80fd\u591f\u8868\u793a\u7684\u6709\u6548\u6570\u5b57\u662f53\u4f4d\uff0c\u8fd9\u591a\u51fa\u7684\u4e00\u4f4d\u662f\u56e0\u4e3a\u6d6e\u70b9\u6570\u7684\u8868\u793a\u65b9\u6cd5\u5047\u5b9a\u5c3e\u6570\u7684\u6700\u524d\u9762\u6709\u4e00\u4e2a\u9690\u542b\u76841\uff08\u5bf9\u4e8e\u96640\u4ee5\u5916\u7684\u6240\u6709\u6570\u5b57\uff09\u3002\u56e0\u6b64\uff0cJavaScript\u80fd\u591f\u7cbe\u786e\u8868\u793a\u7684\u6700\u5927\u6574\u6570\u662f2^53 – 1\u3002\u8d85\u8fc7\u8fd9\u4e2a\u8303\u56f4\u7684\u6574\u6570\uff0c\u7531\u4e8e\u65e0\u6cd5\u5728\u5c3e\u6570\u90e8\u5206\u5b8c\u5168\u8868\u793a\uff0c\u5c06\u65e0\u6cd5\u4fdd\u8bc1\u5176\u7cbe\u5ea6\uff0c\u8fdb\u800c\u5f71\u54cd\u7a0b\u5e8f\u7684\u6b63\u786e\u6027\u3002<\/p>\n<\/p>\n

\u4e09\u3001\u8ba1\u7b97\u7cbe\u5ea6\u7684\u91cd\u8981\u6027<\/h3>\n<\/p>\n

\u5728\u5f88\u591a\u7a0b\u5e8f\u8bbe\u8ba1\u548c\u79d1\u5b66\u8ba1\u7b97\u4e2d\uff0c\u5c24\u5176\u662f\u6d89\u53ca\u91d1\u878d\u3001\u52a0\u5bc6\u6216\u5927\u6570\u636e\u5904\u7406\u7684\u573a\u666f\uff0c\u7cbe\u786e\u8ba1\u7b97\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u7531\u4e8e2^53 – 1\u662fJavaScript\u80fd\u591f\u7cbe\u786e\u8868\u793a\u7684\u6700\u5927\u6574\u6570\uff0c\u56e0\u6b64\u5728\u5904\u7406\u8d85\u8fc7\u6b64\u8303\u56f4\u7684\u6574\u6570\u65f6\uff0c\u6211\u4eec\u9700\u8981\u683c\u5916\u5c0f\u5fc3\uff0c\u907f\u514d\u76f4\u63a5\u64cd\u4f5c\u8fd9\u4e9b\u6570\u503c\u9020\u6210\u7684\u7cbe\u5ea6\u635f\u5931\u3002\u5bf9\u4e8e\u9700\u8981\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u7684\u5e94\u7528\uff0c\u53ef\u4ee5\u91c7\u7528\u7279\u5b9a\u7684\u5e93\u5982BigInt\uff0c\u8fd9\u4f7f\u5f97\u5728JavaScript\u4e2d\u4e5f\u80fd\u5b89\u5168\u5730\u5904\u7406\u548c\u8ba1\u7b97\u5927\u6574\u6570\u3002<\/p>\n<\/p>\n

\u56db\u3001\u907f\u514d\u7cbe\u5ea6\u635f\u5931\u7684\u7b56\u7565<\/h3>\n<\/p>\n

\u9664\u4e86\u4f7f\u7528BigInt\u7b49\u5e93\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u7b56\u7565\u53ef\u4ee5\u907f\u514d\u56e0\u8d85\u8fc7\u6700\u5927\u5b89\u5168\u6574\u6570\u8303\u56f4\u800c\u5bfc\u81f4\u7684\u7cbe\u5ea6\u635f\u5931\u3002\u4f8b\u5982\uff0c\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u53ef\u4ee5\u901a\u8fc7\u5c06\u5927\u6574\u6570\u5206\u89e3\u4e3a\u591a\u4e2a\u8f83\u5c0f\u7684\u6570\u503c\u8fdb\u884c\u5b58\u50a8\u548c\u8ba1\u7b97\uff0c\u6216\u8005\u4f7f\u7528\u5b57\u7b26\u4e32\u7b49\u65b9\u5f0f\u95f4\u63a5\u8868\u793a\u5927\u6574\u6570\u3002\u540c\u65f6\uff0c\u5728\u6d89\u53ca\u5230\u5927\u6570\u8ba1\u7b97\u7684\u573a\u5408\uff0c\u53ca\u65f6\u8fdb\u884c\u8303\u56f4\u68c0\u67e5\uff0c\u4e00\u65e6\u53d1\u73b0\u6570\u503c\u8d85\u51fa\u5b89\u5168\u8303\u56f4\uff0c\u7acb\u5373\u91c7\u53d6\u9002\u5f53\u7684\u5904\u7406\u63aa\u65bd\uff0c\u8fd9\u5bf9\u4e8e\u4fdd\u8bc1\u7a0b\u5e8f\u7684\u51c6\u786e\u6027\u548c\u53ef\u9760\u6027\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/p>\n

\u4e94\u3001\u7ed3\u8bba<\/h3>\n<\/p>\n

JavaScript\u4e2d\u6700\u5927\u7684\u5b89\u5168\u6574\u6570\u662f2^53 – 1\u7684\u539f\u56e0\u6839\u690d\u4e8e\u5176\u6570\u503c\u8868\u793a\u7684\u65b9\u5f0f\u53caIEEE 754\u6807\u51c6\u3002\u7406\u89e3\u8fd9\u4e00\u9650\u5236\u5bf9\u4e8e\u8fdb\u884c\u7cbe\u786e\u8ba1\u7b97\u4ee5\u53ca\u8bbe\u8ba1\u80fd\u591f\u5904\u7406\u5927\u8303\u56f4\u6570\u503c\u7684\u7cfb\u7edf\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4e3a\u4e86\u907f\u514d\u6570\u503c\u8ba1\u7b97\u4e2d\u7684\u8bef\u5dee\u548c\u4e0d\u786e\u5b9a\u6027\uff0c\u5f00\u53d1\u8005\u9700\u8981\u638c\u63e1\u9002\u5f53\u7684\u6280\u5de7\u548c\u7b56\u7565\uff0c\u4ee5\u786e\u4fdd\u5e94\u7528\u7a0b\u5e8f\u7684\u6b63\u786e\u6027\u548c\u9c81\u68d2\u6027\u3002<\/p>\n<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

1. JavaScript \u4e3a\u4ec0\u4e48\u5c06\u6700\u5927\u5b89\u5168\u6574\u6570\u8bbe\u5b9a\u4e3a2\u768453\u6b21\u65b9\u51cf\u4e00\uff1f<\/strong><\/p>\n

JavaScript \u5c06\u6700\u5927\u5b89\u5168\u6574\u6570\u8bbe\u5b9a\u4e3a2\u768453\u6b21\u65b9\u51cf\u4e00\u662f\u56e0\u4e3a\u5728\u8ba1\u7b97\u673a\u5185\u90e8\uff0c\u6574\u6570\u88ab\u8868\u793a\u4e3a\u4e8c\u8fdb\u5236\u5f62\u5f0f\u3002JavaScript\u4f7f\u7528\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u6765\u8868\u793a\u6240\u6709\u6570\u5b57\uff0c\u5176\u8868\u793a\u8303\u56f4\u4e3a -2^53 \u5230 2^53\u3002\u8fd9\u662f\u56e0\u4e3a 53 \u4e2a\u4e8c\u8fdb\u5236\u4f4d\u4e2d\u6709\u4e00\u4f4d\u7528\u4e8e\u8868\u793a\u7b26\u53f7\u4f4d\uff0c\u5269\u4e0b\u7684 52 \u4e2a\u4e8c\u8fdb\u5236\u4f4d\u7528\u4e8e\u8868\u793a\u6709\u6548\u6570\u5b57\u3002\u56e0\u6b64\uff0c2\u768453\u6b21\u65b9\u51cf\u4e00\u6b63\u597d\u5728\u8fd9\u4e2a\u8303\u56f4\u5185\uff0c\u53ef\u4ee5\u88ab JavaScript \u51c6\u786e\u8868\u793a\u3002<\/p>\n

2. \u4e3a\u4ec0\u4e48\u6700\u5927\u5b89\u5168\u6574\u6570\u662f 2\u768453\u6b21\u65b9\u51cf\u4e00\u800c\u4e0d\u662f2\u768453\u6b21\u65b9\uff1f<\/strong><\/p>\n

\u6700\u5927\u5b89\u5168\u6574\u6570\u662f2\u768453\u6b21\u65b9\u51cf\u4e00\u800c\u4e0d\u662f2\u768453\u6b21\u65b9\u662f\u56e0\u4e3a JavaScript \u4f7f\u7528\u4e86\u4e00\u4e2a\u4e8c\u8fdb\u5236\u4f4d\u6765\u8868\u793a\u6b63\u8d1f\u53f7\uff0c\u6240\u4ee5\u6700\u5927\u5b89\u5168\u6574\u6570\u8303\u56f4\u5fc5\u987b\u56ca\u62ec\u6b63\u6570\u548c\u8d1f\u6570\u3002\u5982\u679c\u5c06\u6700\u5927\u5b89\u5168\u6574\u6570\u8bbe\u5b9a\u4e3a2\u768453\u6b21\u65b9\uff0c\u5219\u65e0\u6cd5\u51c6\u786e\u8868\u793a\u8d1f\u6570\u3002\u56e0\u6b64\uff0c\u4e3a\u4e86\u4fdd\u6301\u5bf9\u79f0\u6027\uff0cJavaScript \u5c06\u6700\u5927\u5b89\u5168\u6574\u6570\u8bbe\u7f6e\u4e3a2\u768453\u6b21\u65b9\u51cf\u4e00\u3002<\/p>\n

3. JavaScript \u4e2d\u6700\u5927\u5b89\u5168\u6574\u6570\u7684\u9650\u5236\u6709\u54ea\u4e9b\u5f71\u54cd\uff1f<\/strong><\/p>\n

JavaScript \u4e2d\u6700\u5927\u5b89\u5168\u6574\u6570\u7684\u9650\u5236\u5bf9\u4e8e\u5904\u7406\u5927\u6570\u5b57\u4f1a\u4ea7\u751f\u4e00\u4e9b\u5f71\u54cd\u3002\u5f53\u8d85\u8fc7\u6700\u5927\u5b89\u5168\u6574\u6570\u65f6\uff0c\u6570\u5b57\u5c06\u88ab\u622a\u65ad\u4e3a\u6700\u5927\u5b89\u5168\u6574\u6570\uff0c\u53ef\u80fd\u5bfc\u81f4\u7cbe\u5ea6\u4e22\u5931\u3002\u6b64\u5916\uff0c\u56e0\u4e3a\u6570\u5b57\u5728\u5185\u90e8\u4ee5\u6d6e\u70b9\u6570\u5f62\u5f0f\u8868\u793a\uff0c\u6267\u884c\u6d6e\u70b9\u6570\u8fd0\u7b97\u53ef\u80fd\u4f1a\u5e26\u6765\u820d\u5165\u8bef\u5dee\u3002\u4e3a\u4e86\u5e94\u5bf9\u8fd9\u4e9b\u9650\u5236\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u4f7f\u7528 JavaScript \u63d0\u4f9b\u7684 BigInt \u7c7b\u578b\u6765\u5904\u7406\u8d85\u8fc7\u6700\u5927\u5b89\u5168\u6574\u6570\u7684\u5927\u6570\u5b57\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728JavaScript\u4e2d\uff0c\u6700\u5927\u7684\u5b89\u5168\u6574\u6570\u662f2\u768453\u6b21\u65b9\u51cf\u4e00\uff089,007,199,254,740,991\uff09\uff0c\u8fd9\u662f […]","protected":false},"author":3,"featured_media":169606,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/169592"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=169592"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/169592\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/169606"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=169592"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=169592"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=169592"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}