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Learn/Programming & AI/Thinking Like a Programmer/Basics of python

Thinking Like a Programmer•Interactive notebook lesson•Free

Loops

No account is required. Learn the material, try the examples, and mark it complete locally when you are ready to move on.

For loop

Now we are ready to learn a simple for loop.

Lets imagine if our object was to print a same thing 5 times. We would have to in this case write print function 5 times, right?

Codepython

4 in range(5)

Output

True

Codepython

for i in range(5):
    print("Hello. THe value of i is: {}".format(i))

Output

Hello. THe value of i is: 0
Hello. THe value of i is: 1
Hello. THe value of i is: 2
Hello. THe value of i is: 3
Hello. THe value of i is: 4

Codepython

counter = 10
while counter > 2:
    # print(f"The current value of i: {counter}")
    print(f"counter is greater than 2 and the value of counter is: {counter}")
    # Now it will cause a infinite loop
    # So we will decrease the value of counter
    counter = counter - 1

Output

counter is greater than 2 and the value of counter is: 10
counter is greater than 2 and the value of counter is: 9
counter is greater than 2 and the value of counter is: 8
counter is greater than 2 and the value of counter is: 7
counter is greater than 2 and the value of counter is: 6
counter is greater than 2 and the value of counter is: 5
counter is greater than 2 and the value of counter is: 4
counter is greater than 2 and the value of counter is: 3