JavaScript function 语句

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</a></li> <li><a href="/ha/jsref/dom_obj_time.html" title="HTML DOM Time ɗanɗi"><time></a></li> <li><a href="/ha/jsref/dom_obj_title.html" title="HTML DOM Title ɗanɗi"><title></a></li> <li><a href="/ha/jsref/dom_obj_track.html" title="HTML DOM Track ɗanɗi"><track></a></li> <li><a href="/ha/jsref/dom_obj_u.html" title="HTML DOM Underline ɗanɗi"><u></a></li> <li><a href="/ha/jsref/dom_obj_ul.html" title="HTML DOM Ul ɗanɗi"><ul></a></li> <li><a href="/ha/jsref/dom_obj_var.html" title="HTML DOM Variable ɗanɗi"><var></a></li> <li><a href="/ha/jsref/dom_obj_video.html" title="HTML DOM Video ɗanɗi"><video></a></li> </ul> <h2>其他参考手册</h2> <ul> <li><a href="/ha/jsref/obj_cssstyledeclaration.html" title="CSSStyleDeclaration ɗanɗi">CSSStyleDeclaration</a></li> <li><a href="/ha/jsref/jsref_type_conversion.html" title="JavaScript ɗanɗi ƙirwa ƙara">JS 类型转换</a></li> </ul> </div> <div><h3><center> 选修课 </center><h3> <h2>课程推荐：</h2> <ul> <li><a href="/ha/howto/index.html" title="CodeW3C.com ɗanɗi Bɗaɗɗɗa">CodeW3C.com ɗanɗi Bɗaɗɗɗa</a></li> </ul> </div> </div> <div id="maincontent"> <div class="idea"> <a href="/"><button>English</button></a> <a href="/zh/"><button>中文</button></a> <a href="/oldzh/"><button>繁體中文</button></a> <a href="/ru/"><button>Русский</button></a> <a href="/fr/"><button>Français</button></a> <a href="/de/"><button>Deutsch</button></a> <a href="/es/"><button>Español</button></a> <a href="/pt/"><button>Português</button></a> <a href="/ja/"><button>日本語</button></a> <a href="/ko/"><button>한국어</button></a> <a href="/it/"><button>Italiano</button></a> <a href="/ar/"><button>عربي</button></a> <a href="/hi/"><button>हिंदी</button></a> <a href="/bn/"><button>বাংলা</button></a> <a href="/ms/"><button>Bahasa Malaysia</button></a> <a href="/my/"><button>မြန်မာ</button></a> <a href="/vi/"><button>Tiếng Việt</button></a> <a href="/th/"><button>ภาษาไทย</button></a> <a href="/lo/"><button>ລາວ</button></a> <a href="/id/"><button>Bahasa Indonesia</button></a> <a href="/ur/"><button>اردو</button></a> <a href="/ha/"><button>Hausa</button></a> <a href="/pl/"><button>Język polski</button></a> <a href="/pa/"><button>ਪੰਜਾਬੀ</button></a> <a href="/sv/"><button>Svenska</button></a> <a href="/da/"><button>Dansk</button></a> <a href="/nl/"><button>Nederlands</button></a> <a href="/tr/"><button>Türkçe</button></a> <a href="/fi/"><button>suom.</button></a> <a href="/el/"><button>Ελληνικά</button></a> <a href="/fa/"><button>فارسی</button></a> <a href="/sw/"><button>Kiswahili</button></a> <a href="/te/"><button>తెలుగు</button></a> <a href="/tl/"><button>wikang Galu</button></a> </div> <h1>JavaScript function 语句</h1> <div class="prenextnav-ref"> <ul> <li> 上一页 <a href="/ha/jsref/jsref_forof.html" title="JavaScript ɗanɗi for/of ɗanɗi">for...of</a></li> <li> 下一页 <a href="/ha/jsref/jsref_if.html" title="JavaScript ɗanɗi if/else ɗanɗi">if...else</a></li> <li> 返回上一层 <a href="/ha/jsref/jsref_statements.html" title="JavaScript Statement Reference Manual">JavaScript Statement Reference Manual</a></li> </ul> </div> <div> <h2>定义和用法</h2> <p>function 语句声明函数。</p> <p>声明的函数是“被保存供以后使用的”，并且将在稍后调用时执行。</p> <p>在 JavaScript 中，函数是对象，它们同时拥有属性和方法。</p> <p>也可以使用表达式定义函数（请参阅函数定义）。</p> <p>请阅读我们的 JavaScript 教程，了解您需要学习的有关函数的所有知识。请从关于 JavaScript 函数和 JavaScript 作用域的章节开始。如需更多详细信息，请阅读我们关于函数定义、参数、调用和闭包的教程。</p> <p class="tip"><span>Kuwarin:</span>Kai tsaye ajiyayya return daga ajiyayya.</p> </div> <div> <h2>Dare</h2> <p>Aiki ajiyayya kuma a kai tsaye a cikin aiki aya id="demo" kuma a cikin kai tsaye "Hello World":</p> <pre class="language-js"> function myFunction() { // Aiki ajiyayya document.getElementById("demo").innerHTML = "Hello World!"; } myFunction(); // Aiki ajiyayya </pre> <p class="tiy"><a target="_blank" href="/ha/tiy/t.html?f=jsck_state_function">Girmi ni yinwa</a></p> <p>Kwarin TIY na kai tsaye a kai tsaye na kai tsaye.</p> </div> <div> <h2>Gwamnati</h2> <pre class="language-js"> funksiyon <i>functionName</i>(<i>parameters</i>) { <i>code to be executed</i> } </pre> <h3>Kuduwar ajiyar</h3> <table class="dataintable"> <tr> <th style="width:22%;">Ajiyar</th> <th>Bayani</th> </tr> <tr> <td><i>functionName</i></td> <td>Dauki. Taddeka suna kawu aya, kuma za a iya kawar da su a cikin kai tsaye. An iya amfani dashi har ila ƙasa a, ƙasa, ƙasa, da ƙasa.</td> </tr> <tr> <td><i>parameters</i></td> <td> <p>Iya yiwa. Kira kungiyar suna kawu aya da ke kira, wanda zai tsammanin nisan da ke kai tsaye, tare da kuma koma koma tare da koma.</p> <p>Ajiyar ajiyayya suna kawu aya da ke kira a cikin aiki ajiyayya.</p> <p>Ajiyar ajiyayya suna kawu aya da ke samun aiki a lokacin aiki ajiyayya. A cikin aiki ajiyayya, ajiyar ana amfani dashi azaman muhafiz.</p> <p class="note"><span>Kuwarin:</span>Idanin dake kawu ajiyayya, kuma alamarin dake kawu aya zai kawu 'undefined'.</p> </td> </tr> </table> </div> <div> <h2>技术细节</h2> <table class="definition-usage"> <tr> <th style="width: 22%;">JavaScript 版本：</th> <td>ECMAScript 1</td> </tr> </table> </div> <div> <h2>更多实例</h2> <h3>Dare</h3> <p>返回 PI 的值：</p> <pre class="language-js"> function myFunction() { return Math.PI; } </pre> <p class="tiy"><a target="_blank" href="/ha/tiy/t.html?f=jsck_state_return_pi">Girmi ni yinwa</a></p> <h3>Dare</h3> <p>返回 a 和 b 的乘积：</p> <pre class="language-js"> function myFunction(a, b) { return a * b; } </pre> <p class="tiy"><a target="_blank" href="/ha/tiy/t.html?f=jsck_state_function_1">Girmi ni yinwa</a></p> <h3>Dare</h3> <p>通过使用函数，您可以多次使用有不同参数的相同代码，以产生不同的结果。</p> <p>A girmiwa dake a zama fahrenheit dake a zama Celsius:</p> <pre class="language-js"> function toCelsius(fahrenheit) { return (5/9) * (fahrenheit-32); } </pre> <p class="tiy"><a target="_blank" href="/ha/tiy/t.html?f=jsck_state_function_2">Girmi ni yinwa</a></p> <h3>Dare</h3> <p>Funksiyonin dake a zama a girmiwa dake a zama variable:</p> <p>Bayanin:</p> <pre class="language-js"> temp = toCelsius(32); text = "The temperature is " + temp + " Centigrade"; A zama a girmiwa dake a zama: text = "The temperature is " + toCelsius(32) + " Centigrade"; </pre> <p class="tiy"><a target="_blank" href="/ha/tiy/t.html?f=jsck_state_function_3">Girmi ni yinwa</a></p> <h3>Dare</h3> <p>Kwacalami funksiyonin dake a zama a girmiwa dake a zama objectin na built-in dake a girmiwa dake a zama arguments:</p> <p>arguments.length dake a girmiwa dake a zama a girmiwa dake a funksiyonin dake a yinwa dake a girmiwa dake a paramita:</p> <pre class="language-js"> function myFunction(a, b) { return arguments.length; } </pre> <p class="tiy"><a target="_blank" href="/ha/tiy/t.html?f=jsck_state_function_4">Girmi ni yinwa</a></p> <h3>Dare</h3> <p>Dagin nuna dake a girmiwa dake a yinwa funksiyon, funksiyonin dake a zama a girmiwa dake a id="demo" na elementin dake a girmiwa dake a "Hello World":</p> <pre class="language-js"> <button onclick="myFunction()">Click me</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("demo").innerHTML = "Hello World"; } </script> </pre> <p class="tiy"><a target="_blank" href="/ha/tiy/t.html?f=jsck_state_function_click">Girmi ni yinwa</a></p> <h3>Dare</h3> <p>Kwacalami funksiyonin dake a zama bayanin funksiyon:</p> <p>Bayanin funksiyonin dake a girmiwa dake a zama funksiyon:</p> <pre class="language-js"> var x = function (a, b) {return a * b}; </pre> <p class="tiy"><a target="_blank" href="/ha/tiy/t.html?f=jsck_state_function_5">Girmi ni yinwa</a></p> <h3>Dare</h3> <p>Bayanin funksiyonin dake a girmiwa dake a zama funksiyon:</p> <pre class="language-js"> var x = function (a, b) {return a * b}; var z = x(4, 3); </pre> <p class="tiy"><a target="_blank" href="/ha/tiy/t.html?f=jsck_state_function_6">Girmi ni yinwa</a></p> </div> <div> <h2>Girmi kwarin</h2> <table class="browser-support"> <tr> <th class="bsTh">Dokumentu</th> <th class="bsChrome">Chrome</th> <th class="bsIE">IE</th> <th class="bsFirefox">Firefox</th> <th class="bsSafari">Safari</th> <th class="bsOpera">Opera</th> </tr> <tr> <td>funksiyon</td> <td>Girmi</td> <td>Girmi</td> <td>Girmi</td> <td>Girmi</td> <td>Girmi</td> </tr> </table> </div> <div> <h2>Sayfuna dare</h2> <p>Kwacalami JavaScript:<a href="/ha/js/js_functions.html" title="JavaScript ɗanɗi ƙarar ɗanɗi">JavaScript ɗanɗi ƙarar ɗanɗi</a></p> <p>Kwacalami JavaScript:<a href="/ha/js/js_scope.html" title="JavaScript ɗanɗi ƙarar ɗanɗi">JavaScript ɗanɗi ƙarar ɗanɗi</a></p> <p>Kwacalami JavaScript:<a href="/ha/js/js_function_definition.html" title="JavaScript ɗanɗi ƙarar ɗanɗi">JavaScript ɗanɗi ƙarar ɗanɗi</a></p> <p>Kwacalami JavaScript:<a href="/ha/js/js_function_parameters.html" title="JavaScript ɗanɗi ɗanɗi ɗanɗi">JavaScript ɗanɗi ɗanɗi ɗanɗi</a></p> <p>Kwacalami JavaScript:<a href="/ha/js/js_function_invocation.html" title="JavaScript ɗanɗi ɗanɗi">JavaScript ɗanɗi ɗanɗi</a></p> <p>Kwacalami JavaScript:<a href="/ha/js/js_function_closures.html" title="JavaScript ɗanɗi ɗanɗi">Kwacalami funksiyonin zamani</a></p> <p>Kwacalami JavaScript:<a href="/ha/jsref/jsref_return.html" title="JavaScript ɗanɗi ɗanɗi">JavaScript ɗanɗi ɗanɗi</a></p> </div> <div class="prenextnav-ref"> <ul> <li> 上一页 <a href="/ha/jsref/jsref_forof.html" title="JavaScript ɗanɗi for/of ɗanɗi">for...of</a></li> <li> 下一页 <a href="/ha/jsref/jsref_if.html" title="JavaScript ɗanɗi if/else ɗanɗi">if...else</a></li> <li> 返回上一层 <a href="/ha/jsref/jsref_statements.html" title="JavaScript Statement Reference Manual">JavaScript Statement Reference Manual</a></li> </ul> </div><div style="background-color:#fcfdf8; 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