The Math.ceil() function always rounds a number up to the next largest integer.
Note: Math.ceil([null](/en-US/docs/Web/JavaScript/Reference/Operators/null)) returns integer 0 and does not give a NaN error.
The Math.ceil() function always rounds a number up to the next largest integer.
Note: Math.ceil([null](/en-US/docs/Web/JavaScript/Reference/Operators/null)) returns integer 0 and does not give a NaN error.
Math.ceil(x)
xA number.
The smallest integer greater than or equal to the given number.
Because ceil() is a static method of Math, you always use it as Math.ceil(), rather than as a method of a Math object you created (Math is not a constructor).
The following example shows example usage of Math.ceil().
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
| Specification |
|---|
| ECMAScript Language Specification # sec-math.ceil |
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
ceil |
1 |
12 |
1 |
3 |
3 |
1 |
4.4 |
18 |
4 |
10.1 |
1 |
1.0 |
1.0 |
0.10.0 |
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/ceil