test = "abcdeabcfg"
v = test[4]
print(v)
w =  test[0:3]
print(w)
x = len(test)
print(x)

#while冗長，for的精簡
test = "我是一個臥底"
# index = 0
# while index < len(test):
# v = test[index]
# print(v)
# index += 1
for i in test:
 
print(i)

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