for 迴圈

Python 中級

Hugo Bowne-Anderson

Data Scientist at DataCamp

for 迴圈

for var in seq :
    expression
  • 「對 seq 中每個 var，執行 expression」
Python 中級

fam

family.py

fam = [1.73, 1.68, 1.71, 1.89]

print(fam)

[1.73, 1.68, 1.71, 1.89]
Python 中級

fam

family.py

fam = [1.73, 1.68, 1.71, 1.89]
print(fam[0])
print(fam[1])
print(fam[2])
print(fam[3])

1.73
1.68
1.71
1.89
Python 中級

for 迴圈

for var in seq :
    expression

family.py

fam = [1.73, 1.68, 1.71, 1.89]
for height in fam : 
    print(height)
Python 中級

for 迴圈

for var in seq :
    expression

family.py

fam = [1.73, 1.68, 1.71, 1.89]
for height in fam : 
    print(height)
    # first iteration
    # height = 1.73

1.73
Python 中級

for 迴圈

for var in seq :
    expression

family.py

fam = [1.73, 1.68, 1.71, 1.89]
for height in fam : 
    print(height)
    # second iteration
    # height = 1.68

1.73
1.68
Python 中級

for 迴圈

for var in seq :
    expression

family.py

fam = [1.73, 1.68, 1.71, 1.89]
for height in fam : 
    print(height)

1.73
1.68
1.71
1.89
  • 無法直接存取索引
Python 中級

for 迴圈

for var in seq :
    expression

family.py

fam = [1.73, 1.68, 1.71, 1.89]
  • ？？？
index 0: 1.73
index 1: 1.68
index 2: 1.71
index 3: 1.89
Python 中級

enumerate

for var in seq :
    expression

family.py

fam = [1.73, 1.68, 1.71, 1.89]

for index, height in enumerate(fam) :
    print("index " + str(index) + ": " + str(height))

index 0: 1.73
index 1: 1.68
index 2: 1.71
index 3: 1.89
Python 中級

迴圈遍歷字串

for var in seq :
    expression

strloop.py

for c in "family" :
    print(c.capitalize())

F
A
M
I
L
Y
Python 中級

一起來練習吧！

Python 中級

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