# 迭代器本質就是迴圈（對迴圈的封裝，用來迴圈可迭代物件）
ls = [3,5,2,1,4]
# 需求：迴圈列印ls中每一個成員（元素）
print("列表的長度：", ls.__len__())
count = 0
while count < ls.__len__():
    print(ls[count])
    count += 1


# 迭代器變數列表
print() # 加個換行
for num in ls:
    print(num, end=" ")

print()

dic = {"name": "張三", "age": 8, "gender": "男"}
# 問題：如何逐一列印"張三" | 8 | "男"
for key in dic:
    print(key + ":", dic[key])