JavaScript学习01

逻辑运算

//逻辑非!的结果一定是true or false 而逻辑或和与与实际值有关
var log = console.log;
log(!1); //false
//内部执行如下：
var res = Boolean(1);
res = !res;
log(res);

// == 值是否相等 === 类型也相等
var a = 12;
var b = '12';
log(a == b);
log(a === b);