setmonth_日期setMonth（）方法以及JavaScript中的示例

setmonth

JavaScript日期setMonth()方法 (JavaScript Date setMonth() method)

setMonth() method is a Date class method, it is used to set the month to the Date object with a valid month value (between 0 to 11. 0 for January, 1 for February and so on).

setMonth()方法是Date类的一种方法，用于将月份设置为具有有效月份值的Date对象(0到11之间。1月为0，2月为1，依此类推)。

Note: Month value larger than the 11 will be truncated from the starting month value (0), for example, we are going to set 12 as month value, it will be truncated at 0 and January will be set.

注意：大于11的月份值将从开始的月份值(0)开始被截断，例如，我们将12设置为月份值，将其截断为0并设置一月。

Syntax:

句法：

    var dt = new Date();
dt.setMonth(month);

Examples:

例子：

    Input/Date class object declaration:
var dt = new Date();
Function call to set the month:
dt.setMonth(2);
Function call to get the month:
dt.getMonth(); 
Output:
2

JavaScript code to demonstrate an example of Date.setMonth() method

JavaScript代码演示Date.setMonth()方法的示例

<html>
<head><title>JavaScipt Example</title></head>
<body>
<script>
var dt = new Date();
//getting current month
var month = dt.getMonth();
//printing
document.write("month: " + month + "<br>");
//setting month to March (2)
dt.setMonth(2);
//getting & printing month again
month = dt.getMonth();
document.write("month: " + month + "<br>");
//setting invalid month 
//setting month to 12
dt.setMonth(12);
//getting & printing month again
month = dt.getMonth();
document.write("month: " + month + "<br>");	
</script>
</body>
</html>

Output

输出量