Math.ceil()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Math.ceil()
静态方法总是向上舍入,并返回大于等于给定数字的最小整数。
尝试一下
console.log(Math.ceil(0.95));
// Expected output: 1
console.log(Math.ceil(4));
// Expected output: 4
console.log(Math.ceil(7.004));
// Expected output: 8
console.log(Math.ceil(-7.004));
// Expected output: -7
语法
js
Math.ceil(x)
参数
x
-
一个数值。
返回值
大于等于 x
的最小整数。它的值与 -Math.floor(-x)
相同。
描述
因为 ceil()
是 Math
的静态方法,所以你应始终使用 Math.ceil()
,而不是作为你创建的 Math
对象的方法(Math
不是构造函数)。
示例
使用 Math.ceil()
js
Math.ceil(-Infinity); // -Infinity
Math.ceil(-7.004); // -7
Math.ceil(-4); // -4
Math.ceil(-0.95); // -0
Math.ceil(-0); // -0
Math.ceil(0); // 0
Math.ceil(0.95); // 1
Math.ceil(4); // 4
Math.ceil(7.004); // 8
Math.ceil(Infinity); // Infinity
规范
Specification |
---|
ECMAScript® 2025 Language Specification # sec-math.ceil |
浏览器兼容性
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ceil |
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