{"json_modified": "2015-04-17T06:54:37.784496", "slug": "Web/JavaScript/Reference/Global_Objects/Math/log2", "tags": [], "locale": "zh-CN", "title": "Math.log2()", "translations": [{"title": "Math.log2()", "url": "/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/log2", "tags": ["Reference", "Experimental", "R\u00e9f\u00e9rence", "Math", "Exp\u00e9rimental", "JavaScript", "ECMAScript6", "Method"], "summary": "The <strong><code>Math.log2()</code></strong> function returns the base 2 logarithm of a number, that is", "localization_tags": [], "locale": "en-US", "last_edit": "2015-02-05T04:54:22", "review_tags": []}, {"title": "Math.log2()", "url": "/fr/docs/Web/JavaScript/Reference/Objets_globaux/Math/log2", "tags": ["polyfill", "Reference", "Experimental", "R\u00e9f\u00e9rence", "Math", "Exp\u00e9rimental", "JavaScript", "ECMAScript6", "Method"], "summary": "La fonction <code><strong>Math.log2()</strong></code> renvoie le logarithme en base 2 d'un nombre :", "localization_tags": [], "locale": "fr", "last_edit": "2015-02-07T05:40:49", "review_tags": []}, {"title": "Math.log2()", "url": "/ru/docs/Web/JavaScript/Reference/Global_Objects/Math/log2", "tags": ["Reference", "Experimental", "R\u00e9f\u00e9rence", "Math", "Exp\u00e9rimental", "JavaScript", "ECMAScript6", "Method"], "summary": "\u041c\u0435\u0442\u043e\u0434 <strong><code>Math.log2()</code></strong> \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u0434\u0432\u043e\u0438\u0447\u043d\u044b\u0439 (\u043f\u043e \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0438\u044e 2) \u043b\u043e\u0433\u0430\u0440\u0438\u0444\u043c \u0447\u0438\u0441\u043b\u0430, \u0442\u043e \u0435\u0441\u0442\u044c", "localization_tags": [], "locale": "ru", "last_edit": "2015-02-05T04:58:17", "review_tags": []}], "modified": "2015-04-17T06:54:36", "label": "Math.log2()", "localization_tags": [], "url": "/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Math/log2", "last_edit": "2015-04-17T06:54:33", "summary": "<code><strong>Math.log2()</strong></code>\u00a0\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u6570\u5b57\u4ee5 2 \u4e3a\u5e95\u7684\u5bf9\u6570.", "sections": [{"id": "Quick_Links", "title": "JavaScript \u6807\u51c6\u5e93 Math \u5c5e\u6027 Math.E Math.LN10 Math.LN2 Math.LOG10E Math.LOG2E Math.PI Math.SQRT1_2 Math.SQRT2 \u65b9\u6cd5 Math.abs() Math.acos() Math.acosh() [Translate] Math.asin() Math.asinh() [Translate] Math.atan() Math.atan2() Math.atanh() [Translate] Math.cbrt() Math.ceil() Math.clz32() Math.cos() Math.cosh() [Translate] Math.exp() Math.expm1() Math.floor() Math.fround() Math.hypot() Math.imul() Math.log() Math.log10() Math.log1p() Math.log2() Math.max() Math.min() Math.pow() Math.random() Math.round() Math.sign() Math.sin() Math.sinh() Math.sqrt() Math.tan() Math.tanh() [Translate] Math.trunc() \u7ee7\u627f Object \u5c5e\u6027 Object.prototype.__count__ [Translate] Object.prototype.__noSuchMethod__ [Translate] __parent__ __proto__ constructor \u65b9\u6cd5 Object.prototype.__defineGetter__() Object.prototype.__defineSetter__() Object.prototype.__lookupGetter__() Object.prototype.__lookupSetter__() [Translate] Object.prototype.hasOwnProperty() isPrototypeOf propertyIsEnumerable Object.prototype.toLocaleString() Object.toSource Object.prototype.toString() Object.prototype.unwatch() [Translate] Object.prototype.valueOf() watch"}, {"id": "Summary", "title": "\u6982\u8ff0"}, {"id": "Syntax", "title": "\u8bed\u6cd5"}, {"id": "Parameters", "title": "\u53c2\u6570"}, {"id": "Description", "title": "\u63cf\u8ff0"}, {"id": "Examples", "title": "\u793a\u4f8b"}, {"id": ".E8.A7.84.E8.8C.83", "title": "\u89c4\u8303"}, {"id": ".E6.B5.8F.E8.A7.88.E5.99.A8.E5.85.BC.E5.AE.B9.E6.80.A7", "title": "\u6d4f\u89c8\u5668\u517c\u5bb9\u6027"}, {"id": "See_also", "title": "\u76f8\u5173\u94fe\u63a5"}], "id": 84419, "review_tags": []}