选择题【1530/1530】输出是什么？
1function sayHi() { 2 console.log(name) 3 console.log(age) 4 var name = 'Lydia' 5 let age = 21 6} 7 8sayHi()
难度：
2021-07-02 创建本题为“单选题”
1function sayHi() { 2 console.log(name) 3 console.log(age) 4 var name = 'Lydia' 5 let age = 21 6} 7 8sayHi()
本题为“单选题”
