Loops

Looping Statements

Loops are used to repeat a block of code multiple times. Instead of writing the same code over and over, you use a loop.

For Loop

for loop = used to iterate over a sequence [string, list, set, tuple]. repeat a block of code an exact amount of time

for_loop.py

fruitlist = ["banana", "apple", "orange", "watermelon"]

for i in range(10):       # in case of range - range(start, end, step)
    print(i)              # print from 0-9

for x in fruitlist:
    # iterates over each item in this list (same for string, set and tuple)
    print(x)

While Loop

while loop = repeats a block of code as long as a condition is True.
we should re-check the condition at the end of the loop

while_loop.py

name = input("Enter your name: ")

while(name == ""):
    name = input("Enter your name: ")

print(f"your name is {name}")

This while loop keeps asking "Enter your name:" until you type something. If you press Enter without typing, it asks again. (That is the condition will be true so it loops again) If you enter a name, the loop stops. (Here, the condition will turn false so it does not repeat)

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