math.ceil帶小數點

JavaScript | Math.ceil()方法 (JavaScript | Math.ceil() Method)

Math.ceil() is a function in math library of JavaScript that is used to round up the number passed to the function. The method will return the nearest integer value indeed is greater than the passed number.

Math.ceil()是JavaScript數學庫中的函數，用于舍入傳遞給該函數的數字。 該方法將返回最接近的整數值，該整數值確實大于傳遞的數字。

Syntax:

句法：

    Math.ceil(val);

Parameter(s):

參數：

• val – It represents the value to be rounded up.

  val –表示要四舍五入的值。

Return value:

返回值：

The return type of this method is number, it returns the a number which is rounded up value of the number passed to the method.

該方法的返回類型為number ，它返回一個數字，該數字是傳遞給該方法的數字的四舍五入值。

Technical Insights:

技術見解：

• JavaScript version: ECMAScript 1

  JavaScript版本：ECMAScript 1

• Browser support: Chrome, Internet Explorer, Mozilla, Safari, Opera mini

  瀏覽器支持：Chrome，Internet Explorer，Mozilla，Safari，Opera mini

Values accepted: Integer, floating point, single value array, numeric string.

接受的值：整數，浮點數，單值數組，數字字符串。

Invalid Values: non-numeric string, multi value array, empty variable, empty array all will return NaN (not a number).

無效值：非數字字符串，多值數組，空變量，空數組都將返回NaN(不是數字) 。

Example 1: Valid values for the method

示例1：方法的有效值

console.log(Math.ceil(5.21));
console.log(Math.ceil(10.98));
console.log(Math.ceil(-3.32));
console.log(Math.ceil(0));
console.log(Math.ceil("7.18"));

Output

輸出量

6
11
-3
0
8

Example 2: Invalid values for the method.

示例2：方法的無效值。

console.log(Math.ceil("IncludeHelp"));
// Output: NaN
console.log(Math.ceil(1 + 5i));
// Output: Uncaught SyntaxError: Invalid or unexpected token

翻譯自: https://www.includehelp.com/code-snippets/math-ceil-method-with-example-in-javascript.aspx

math.ceil帶小數點