1.写出打印结果
var a = (10 * 3 - 4 / 2 + 1) % 2,
b = 3
b % = a + 3
document.write(a++);
document.write("<br>");
document.write(--b);
2.var a = 123;var b = 234; 请交换a, b旳值。
1 var a = 123
var b = 234
var c = a;
a = b ;
b = c ;
document.write (a, b);
234123
2. var a = 123
var b = 234
a = a + b ;
b = a - b ;
a = a - b;
document.write(a, b);
234123
条件语句补充
switch case
break
continue
