``` //需求是3个 已领2个 var a = 3; var b = a === 3 ? '已领完' : (a === 0 ? '未领' : '部分领取') console.log(b); //已领完 ``` > 单条件 ``` var a = 3; var b = a === 0 ? '未领' : '部分领取' console.log(b); //部分领取 ```