#範例5-9：串列/數組/列表list的迴圈應用
#https://www.w3schools.com/python/python_lists_loop.asp
#https://www.w3school.com.cn/python/python_lists.asp

#list的迴圈有3種：
#（1）for item in a1:
#（2）for i in range(0, len(a1)):
#（3）[item for item in a1]

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#1.list的第1種迴圈
a1 = ["tom","john","mike","jolin"]



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#2.list的第2種迴圈
a1 = ["tom","john","mike","jolin"]
print()



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#3.list的第3種迴圈
a1 = ["tom","john","mike","jolin"]



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#4.查詢是否存在list內，不需要使用迴圈即可完成
#題目：判別jolin是否在list內
print()


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#範例5-9：串列/數組/列表list的迴圈應用
#https://www.w3schools.com/python/python_lists_loop.asp
#https://www.w3school.com.cn/python/python_lists.asp

#list的迴圈有3種：
#（1）for item in a1:
#（2）for i in range(0, len(a1)):
#（3）[item for item in a1]

#1.list的第1種迴圈
a1 = ["tom","john","mike","jolin"]
for item in a1:
  print(item)

#2.list的第2種迴圈
a1 = ["tom","john","mike","jolin"]
print()
for i in range(0, len(a1)):
  print(i, a1[i])

#3.list的第3種迴圈
a1 = ["tom","john","mike","jolin"]
a2 = [item for item in a1]
print(a2)

#4.查詢是否存在list內，不需要使用迴圈即可完成
#題目：判別jolin是否在list內
print()
n1 = "jolin"
if n1 in a1:
  print(n1, "是本班同學")
else:
  print(n1, "不是本班同學")



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