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+---
+title: Math.ceil()
+slug: Web/JavaScript/Reference/Global_Objects/Math/ceil
+translation_of: Web/JavaScript/Reference/Global_Objects/Math/ceil
+---
+<div>{{JSRef}}</div>
+
+<div>Math.ceil() 함수는 주어진 숫자보다 크거나 같은 숫자 중 가장 작은 숫자를 integer 로 반환합니다.</div>
+
+<div> </div>
+
+<h2 id="Syntax_(문법)">Syntax (문법)</h2>
+
+<pre class="syntaxbox"><code>Math.ceil(<var>x</var>)</code></pre>
+
+<h3 id="Parameters_(매개변수)">Parameters (매개변수)</h3>
+
+<dl>
+ <dt><code>x</code></dt>
+ <dd>숫자</dd>
+</dl>
+
+<h3 id="Return_value_(반환값)">Return value (반환값)</h3>
+
+<p>주어진 숫자보다 크거나 같은 숫자 중 가장 작은 숫자</p>
+
+<h2 id="Description_(설명)">Description (설명)</h2>
+
+<p>ceil() 은 Math 의 정적 메소드이므로, 사용자가 생성하는 Math 객체의 메소드처럼 사용하지 않고, 언제나 Math.ceil() 의 형태로 사용 합니다. (Math 는 생성자가 아님)</p>
+
+<h2 id="Examples_(예제)">Examples (예제)</h2>
+
+<h3 id="Math.ceil()_사용_예">Math.ceil() 사용 예</h3>
+
+<p>다음은 Math.ceil() 의 사용 예입니다.</p>
+
+<pre class="brush: js">Math.ceil(.95); // 1
+Math.ceil(4); // 4
+Math.ceil(7.004); // 8
+Math.ceil(-0.95); // -0
+Math.ceil(-4); // -4
+Math.ceil(-7.004); // -7
+</pre>
+
+<h3 id="소수점_처리">소수점 처리</h3>
+
+<pre class="brush: js">// Closure
+(function() {
+ /**
+ * Decimal adjustment of a number.
+ *
+ * @param {String} type The type of adjustment.
+ * @param {Number} value The number.
+ * @param {Integer} exp The exponent (the 10 logarithm of the adjustment base).
+ * @returns {Number} The adjusted value.
+ */
+ function decimalAdjust(type, value, exp) {
+ // If the exp is undefined or zero...
+ if (typeof exp === 'undefined' || +exp === 0) {
+ return Math[type](value);
+ }
+ value = +value;
+ exp = +exp;
+ // If the value is not a number or the exp is not an integer...
+ if (isNaN(value) || !(typeof exp === 'number' &amp;&amp; exp % 1 === 0)) {
+ return NaN;
+ }
+ // Shift
+ value = value.toString().split('e');
+ value = Math[type](+(value[0] + 'e' + (value[1] ? (+value[1] - exp) : -exp)));
+ // Shift back
+ value = value.toString().split('e');
+ return +(value[0] + 'e' + (value[1] ? (+value[1] + exp) : exp));
+ }
+
+ // Decimal round
+ if (!Math.round10) {
+ Math.round10 = function(value, exp) {
+ return decimalAdjust('round', value, exp);
+ };
+ }
+ // Decimal floor
+ if (!Math.floor10) {
+ Math.floor10 = function(value, exp) {
+ return decimalAdjust('floor', value, exp);
+ };
+ }
+ // Decimal ceil
+ if (!Math.ceil10) {
+ Math.ceil10 = function(value, exp) {
+ return decimalAdjust('ceil', value, exp);
+ };
+ }
+})();
+
+// Round
+Math.round10(55.55, -1); // 55.6
+Math.round10(55.549, -1); // 55.5
+Math.round10(55, 1); // 60
+Math.round10(54.9, 1); // 50
+Math.round10(-55.55, -1); // -55.5
+Math.round10(-55.551, -1); // -55.6
+Math.round10(-55, 1); // -50
+Math.round10(-55.1, 1); // -60
+// Floor
+Math.floor10(55.59, -1); // 55.5
+Math.floor10(59, 1); // 50
+Math.floor10(-55.51, -1); // -55.6
+Math.floor10(-51, 1); // -60
+// Ceil
+Math.ceil10(55.51, -1); // 55.6
+Math.ceil10(51, 1); // 60
+Math.ceil10(-55.59, -1); // -55.5
+Math.ceil10(-59, 1); // -50
+</pre>
+
+<h2 id="Specifications_(사용법)">Specifications (사용법)</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comment</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES1')}}</td>
+ <td>{{Spec2('ES1')}}</td>
+ <td>Initial definition. Implemented in JavaScript 1.0.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES5.1', '#sec-15.8.2.6', 'Math.ceil')}}</td>
+ <td>{{Spec2('ES5.1')}}</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ES6', '#sec-math.ceil', 'Math.ceil')}}</td>
+ <td>{{Spec2('ES6')}}</td>
+ <td> </td>
+ </tr>
+ <tr>
+ <td>{{SpecName('ESDraft', '#sec-math.ceil', 'Math.ceil')}}</td>
+ <td>{{Spec2('ESDraft')}}</td>
+ <td> </td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility_(브라우저_호환성)">Browser compatibility (브라우저 호환성)</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Feature</th>
+ <th>Chrome</th>
+ <th>Firefox (Gecko)</th>
+ <th>Internet Explorer</th>
+ <th>Opera</th>
+ <th>Safari</th>
+ </tr>
+ <tr>
+ <td>Basic support</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Feature</th>
+ <th>Android</th>
+ <th>Chrome for Android</th>
+ <th>Firefox Mobile (Gecko)</th>
+ <th>IE Mobile</th>
+ <th>Opera Mobile</th>
+ <th>Safari Mobile</th>
+ </tr>
+ <tr>
+ <td>Basic support</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ <td>{{CompatVersionUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="See_also_(추가_참조)">See also (추가 참조)</h2>
+
+<ul>
+ <li>{{jsxref("Math.abs()")}}</li>
+ <li>{{jsxref("Math.floor()")}}</li>
+ <li>{{jsxref("Math.round()")}}</li>
+ <li>{{jsxref("Math.sign()")}}</li>
+ <li>{{jsxref("Math.trunc()")}}</li>
+</ul>