赋值运算符

可以将符号右侧的值赋值给符号左侧的变量

    <script type="text/javascript">
            /*
             * =
             *     可以将符号右侧的值赋值给符号左侧的变量
             * += 
             *     a += 5 等价于 a = a + 5
             * -=
             *     a -= 5 等价于 a = a - 5
             * *=
             *     a *= 5 等价于 a = a * 5
             * /=
             *     a /= 5 等价于 a = a / 5
             * %=
             *     a %= 5 等价于 a = a % 5
             *     
             */
            var a = 10;
            //a = a + 5;
            //a += 5;
            //a -= 5;
            //a *= 5;
            // a = a%3;
            a %= 3;
            console.log("a = "+a);
        </script>