Looping in Python

Loops allow you to execute a block of code repeatedly. Python has two main types of loops: for and while.

The for Loop

The for loop iterates over a sequence (like a list, tuple, string, or range).

# Iterating over a list
fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
    print(fruit)

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

The while Loop

The while loop continues as long as a condition is true.

count = 0
while count < 5:
    print(count)
    count += 1

Loop Control Statements

• break : Exits the loop prematurely

• continue : Skips the current iteration and continues with the next

• pass : Does nothing (placeholder)

# break example
for i in range(10):
    if i == 5:
        break
    print(i)

# continue example
for i in range(10):
    if i % 2 == 0:
        continue
    print(i)

# pass example
for i in range(5):
    if i == 2:
        pass  # Do nothing
    print(i)

Nested Loops

You can have loops inside loops.

for i in range(3):
    for j in range(2):
        print(f"i={i}, j={j}")

Infinite Loops

Be careful with while loops to avoid infinite loops.

# This will run forever (don't run this!)
# while True:
#     print("Infinite loop")