执行下列程序,输出结果为()
var a = 1; function fn(){ var a = 2; function a(){console.log(3);} return a; function a(){console.log(4);} } var b = fn(); console.log(b);
function fn(){ function a(){ console.log(3) } function a(){ console.log(4) } var a; a = 2; return a; }