...num3 | num4);//27 00000000000000000000000000011011 有一个1时返回1
//XOR
console.log(num3 ^ num4);//26 00000000000000000000000000011010 只有一个1的时候才返回1
//左移
var oldValue=2; //00000000000000000000000000000010
console.log(oldValue << 5);//00000000000000000000000001...
