console 命令行工具 X clear

console

var globalvar=1;

document.write(globalvar+"<br/>");
document.write(globalvar2+"<br/>");

function test()
{
    var localvar=2;
    document.write(globalvar+"<br/>");
    document.write(localvar+"<br/>");
}
test();

var globalvar2=3;

function test2()
{
    var localvar2=4;
}
document.write(globalvar+"<br/>");

function year(y)
{   
    if(y%4==0 && y%100!=0)
    {
        document.write(y+"是闰年"+"<br/>");
    } 
    else if(y%400==0)
    {
        document.write(y+"是闰年"+"<br/>");
    }       
    else
    {
        document.write(y+"不是闰年"+"<br/>");
    }               
}
year(2000);
year(2020);
year(2007);


function max(m)
{
    var A=0;
    for(var i=0;i<4;i++)
    {
        if(A<m[i])
        {
            A=m[i];
        }
    }
    document.write(A+"<br/");
}

var m=[5,10,-15,-20];
max(m);

function px(a)
{
	var t=0;
	for (var j=0;j<4;j++)
	{
		for (var i=0;i<4;i++)
		{
			if(a[i]>a[i+1])
			{
				t=a[i];
				a[i]=a[i+1];
				a[i+1]=t;
			}
		}
	}
    document.write("min="+a[0]+"max="+a[4]+"<br/>");
}

var a=[-1,2,10,3,0];
px(a);
document.write("min="+a[0]+"max="+a[4]+"<br/>");

<!DOCTYPE html> 
<html>
<head>
<meta charset="utf-8" />
<title>Javascript函数</title>

</head>
<body>



</body>
</html>