Method charAt() wa String wa JavaScript

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</pre> <p class="tiy"><a target="_blank" href="/sw/tiy/t.html?f=jsck_charat_1">let letter = text.charAt(3.14);</a></p> <h3>例子 2</h3> <p>获取字符串中的第二个字符：</p> <pre class="language-js"> Inasababisha kufikia kiwango cha kifungu cha bila maana: let letter = text.charAt(1); </pre> <p class="tiy"><a target="_blank" href="/sw/tiy/t.html?f=jsck_charat_2">let letter = text.charAt(3.14);</a></p> <h3>例子 3</h3> <p>获取字符串中的最后一个字符：</p> <pre class="language-js"> Inasababisha kufikia kiwango cha kifungu cha bila maana: let letter = text.charAt(text.length-1); </pre> <p class="tiy"><a target="_blank" href="/sw/tiy/t.html?f=jsck_charat_3">let letter = text.charAt(3.14);</a></p> <h3>例子 4</h3> <p>超出范围的索引返回空字符串：</p> <pre class="language-js"> Inasababisha kufikia kiwango cha kifungu cha bila maana: let letter = text.charAt(15); </pre> <p class="tiy"><a target="_blank" href="/sw/tiy/t.html?f=jsck_charat_4">let letter = text.charAt(3.14);</a></p> <h3>例子 5</h3> <p>默认索引为 0：</p> <pre class="language-js"> Inasababisha kufikia kiwango cha kifungu cha bila maana: let letter = text.charAt(); </pre> <p class="tiy"><a target="_blank" href="/sw/tiy/t.html?f=jsck_charat_5">let letter = text.charAt(3.14);</a></p> <h3>let letter = text.charAt();</h3> <p>Mfano 6</p> <pre class="language-js"> Inasababisha kufikia kiwango cha kifungu cha bila maana: let text = "HELLO WORLD"; </pre> <p class="tiy"><a target="_blank" href="/sw/tiy/t.html?f=jsck_charat_6">let letter = text.charAt(3.14);</a></p> </div> <div> <h2>Inafaa kufikia kwa kufanya kufikia kwa matokeo wa kusikia</h2> <pre><i>string</i>Inayotumika<i>n</i>.charAt(</pre> <h3>)</h3> <table class="parameter"> <tr> <th style="width: 25%;">)</th> <th>Aina</th> </tr> <tr> <td><i>n</i></td> <td>Parameter</td> </tr> </table> <h3>Inahitajika. Namba. Kiwango cha herufi (kinafsa).</h3> <table class="dataintable"> <tr> <th style="width: 25%;">Matokeo</th> <th>Aina</th> </tr> <tr> <td>Kinafsa</td> <td> <p>Herufi</p> <p>Inaeleza herufi kwa kuzingatia kiwango cha kufikirwa.</p> </td> </tr> </table> <h3>Muhtasari</h3> <p>Ikiwa kifungu chake ni bila maana, haujatoa. <i>n</i> Haiweza kufikirwa katika 0 na <i>string</i>ikijitahidi .length-1, mawakili haujatoa.</p> <p class="important"><span>Kujaambia:</span>JavaScript haina aina ya data ya herufi kama kiume ya string, kwa hivyo herufi iliyoruhusiwa ni string ya ukubwa 1.</p> </div> <div> <h2>Wakati wa kufungua</h2> <p><code>charAt()</code> Ina mafuta ya ECMAScript1 (ES1).</p> <p>Woteza wote za vifaa vya ES1 (JavaScript 1997):</p> <table class="browser-support"> <tr> <th class="bsChrome">Chrome</th> <th class="bsIE">IE</th> <th class="bsEdge">Edge</th> <th class="bsFirefox">Firefox</th> <th class="bsSafari">Safari</th> <th class="bsOpera">Opera</th> </tr> <tr> <td>Chrome</td> <td>IE</td> <td>Edge</td> <td>Firefox</td> <td>Safari</td> <td>Opera</td> </tr> <tr> <td>Msaada</td> <td>Msaada</td> <td>Msaada</td> <td>Msaada</td> <td>Msaada</td> <td>Msaada</td> </tr> </table> </div> <div> <h2>Picha za Kitambaa</h2> <p><a href="/sw/js/js_strings.html" title="Mwili wa JavaScript">Mwili wa JavaScript</a></p> <p><a href="/sw/js/js_string_methods.html" title="Method ya Mwili wa JavaScript">Method ya Mwili wa JavaScript</a></p> <p><a href="/sw/js/js_string_search.html" title="Tafuta Mwili wa JavaScript">Tafuta Mwili wa JavaScript</a></p> </div> <div class="prenextnav-ref"> <ul> <li> Pia Zaidi <a href="/sw/jsref/jsref_string_at.html" title="Method ya String at() ya JavaScript">at()</a></li> <li> Pya Zaidi <a href="/sw/jsref/jsref_charcodeat.html" title="Method ya charCodeAt() ya JavaScript">charCodeAt()</a></li> <li> Retunza Kipengele Chini <a href="/sw/jsref/jsref_obj_string.html" title="Makala ya Mafanikio ya String ya JavaScript">Makala ya Mafanikio ya String ya JavaScript</a></li> </ul> </div><div style="background-color:#fcfdf8; padding:0;"> </div> </div>  <div id="sidebar"> <div><h3><center> Makina ya Tengeneza </center><h3> <h5 id="tools_reference"><a href="/sw/jsref/index.html">Makala ya Mafanikio ya JavaScript na HTML DOM</a></h5> <h5 id="tools_example"><a href="/sw/js/js_examples.html">Mifano ya JavaScript</a></h5> <h5 id="tools_quiz"><a href="/sw/js/js_quiz.html">Majadiliano ya JavaScript</a></h5> <h5 id="tools_tutorial"><a href="/sw/js/index.html">Mafunzo ya JavaScript</a></h5> </div> <div><h3><center> Makina ya Mwako </center><h3> <div id="sbtg"> <script src="/myjs/zzsr.js"></script> </div> </div> </div> <div id="footer"> <p id="p1"> Matendo ya CodeW3C.com yana uzalishwa kwa mafunzo na michezo, hatukii uhusiano wa kina na kawaida. 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