题目内容
(请给出正确答案)
[单选题]
以下哪个数组写法正确,而且长度最长()
A.var arr1 = []
B.var arr2 = new Array(5)
C.var arr3 = new Array(5,4)
D.var arr4 = new Array(3,2,1)
答案
B、var arr2 = new Array(5)
如果结果不匹配,请 联系老师 获取答案
A.var arr1 = []
B.var arr2 = new Array(5)
C.var arr3 = new Array(5,4)
D.var arr4 = new Array(3,2,1)
B、var arr2 = new Array(5)