1.1
if (...)
{
...
}
else
{
...
}
<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<body> <script charset = "utf-8"> function myfunction(){
var x = 11;
var y = x % 2;
document.write(y + "<br>");
if (x % 2 == 1){
document.write("单数");
}
else
{
document.write("双数");
}
} myfunction(); </script> </body>
</html>
1.2
if (条件1)
{
...
}
else if (条件2)
{
...
}
else
{
...
}
<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<body> <script charset = "utf-8"> function myfunction(x){
var y = x % 2;
if (x % 2 == 0){
document.write("双数");
}
else if (x > 10)
{
document.write("大于10的单数");
}
else
{
document.write("普通单数");
} document.write("<br>");
document.write(x);
} myfunction(15); </script> </body>
</html>