for loops — iterate over sequences

Basic for loop

fruits = ['apple', 'banana', 'cherry']

for fruit in fruits:
    print(fruit)

# Output:
# apple
# banana
# cherry

Loop over strings

text = "Hello"

for char in text:
    print(char)

# Output:
# H
# e
# l
# l
# o

Loop with range

for i in range(5):
    print(i)

# Output: 0, 1, 2, 3, 4

for i in range(2, 5):
    print(i)

# Output: 2, 3, 4

Loop over dictionaries

person = {'name': 'Alice', 'age': 30, 'city': 'NYC'}

# Loop over keys:
for key in person:
    print(key)

# Loop over values:
for value in person.values():
    print(value)

# Loop over items:
for key, value in person.items():
    print(f"{key}: {value}")

break and continue

# break — exit loop early:
for i in range(10):
    if i == 5:
        break
    print(i)  # Prints 0-4, then stops

# continue — skip to next iteration:
for i in range(10):
    if i % 2 == 0:
        continue  # Skip even numbers
    print(i)  # Prints only odd numbers

else clause

else runs if loop completes without break:

for i in range(5):
    if i == 10:
        break
else:
    print("Loop completed normally")  # Runs because no break