Python for loop

The python for loop is always used in combination with an iterable object such as range, list, string or dictionary.

1. Range

for i in range(5):
    print(i)
Output: 
0
1
2
3
4

2. List

fruits = ['pineapple', 'orange', 'strawberry']
for fruit in fruits:
    print(fruit)
Output: 
pineapple
orange
strawberry

3. String

for x in "abc":
  print(x)
Output: 
a
b
c

4. Dictionary

hitpoints = {'Zombieman': 20, 'Imp': 60, 'Cyberdemon': 4000}
for enemytype, hp in hitpoints.items():
    print(f"{enemytype}: {hp}HP")
Output: 
Zombieman: 20HP
Imp: 60HP
Cyberdemon: 4000HP

5. Nested For Loops

matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
for row in matrix:
    for item in row:
        print(item)
Output: 
1
2
3
4
5
6
7
8
9

6. List Comprehension

squares = [x**2 for x in range(2, 5)]
print(squares)
Output: 
[4, 9, 16]




Impressum