Original subtitles

0 In the previous video we built this code. The code goes like this. 1

We assign the empty string to user name variable, and then we build a while loop which checks if this 2

condition is true. 3

So if the condition of that user name is different from pypy. 4

If user name is different from pypy, this is going to be executed. 5

So in the first iteration user name is actually different from pypy because user name is an empty 6

string. 7

Therefore this is going to be executed. 8

The program asks for the user name. If the input is a for example a will be assigned to user name and 9

then the second iterations starts. 10

So while A is different from pypy which is true, this is going to be executed again. 11

That's why we get these prompt here again. 12

If you enter pypy, the loop ends because in the third iteration pypy is not different from 13

pypy, so this will not occur anymore. 14

Now there is a different way to do this using a brake statement instead of doing the above. 15

Let me 16

do it another way. 17

Again using the while loop but this time you want to check if true. 18

While true which is always true so the loop will always execute until we break it, so while true 19

we want to ask for the user name, input enter the user name. 20

Now we want to create a conditional here to check inside the while loop. 21

So if user name is pypy, and break the loop. 22

Else continue. 23

Let's see what this will give us Python 3 24

b.py. 25

That's the right side script. 26

Enter username. 27

Nope. 28

Nope. 29

Pypy. 30

Yes. 31

Let me try again. 32

If you enter pypy right away again the loop terminates. 33

I do prefer this actually because it gives you more control of the workflow. 34

So this is what's happened here, while true which is always true. 35

So the first iteration occurs because true is true, and we ask for the user name in the first iteration. 36

So in the first iteration here the user name was asfd. 37

So if asfd is equal to pypy breaks the loop. That is not the case because asfd is different then 38

pypy. 39

Therefore this will not occur because this condition is false. 40

Else will be executed. 41

Continue. 42

Now what continue does is it moves the control on top of the loop again. 43

So that's how you use break and continue in a while loop. 44

Both ways are correct but I do find this more readable.