for loop

Intermediate Python

Hugo Bowne-Anderson

Data Scientist at DataCamp

for loop

for var in seq :
    expression
  • "for each var in seq, execute expression"
Intermediate Python

fam

family.py

fam = [1.73, 1.68, 1.71, 1.89]

print(fam)

[1.73, 1.68, 1.71, 1.89]
Intermediate Python

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
Intermediate Python

for loop

for var in seq :
    expression

family.py

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

for loop

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
Intermediate Python

for loop

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
Intermediate Python

for loop

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
  • No access to indexes
Intermediate Python

for loop

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
Intermediate Python

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
Intermediate Python

Loop over string

for var in seq :
    expression

strloop.py

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

F
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M
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L
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Intermediate Python

Let's practice!

Intermediate Python

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