Loops

A loop in Python lets you repeat a block of code multiple times, this reduces the amount of code we need to write and also improves efficiency. Loops also allows us to run code specific number of times or forever.

Types of Loops:

• In Python we have 2 types of loops

• For - To repeat something a certain amount of Times

• While - As long as it's true, which can mean forever or as long as the program is running.

Example of For Loop:

for i in range(1, 6):  #Iterate from 1-5, 6 is excluded.
    print(i)

Output:

1
2
3
4
5

How does this work?

This loop creates a range between 1-5 and displays the output instantly. We could slow down the program by adding a time delay.

---

while True:
    user_input = input("Type something (or 'quit' to stop): ")
    if user_input.lower() == "quit":
        print("Goodbye!")
        break  # Exit the loop
    print(f"You typed: {user_input}")

Output:

Type something (or 'quit' to stop): hello
You typed: hello
Type something (or 'quit' to stop): python
You typed: python
Type something (or 'quit' to stop): quit
Goodbye!

How does this work?

While True keeps the program running forever. If the user enters "quit" Then the loop is broken and the program stops.