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Apprendre while loop (1/2) | Loops
Learn Python from Scratch
course content

Contenu du cours

Learn Python from Scratch

Learn Python from Scratch

1. The basics
2. Arithmetic operations
3. Common data types
4. Conditional statements
5. Other data types
6. Loops
7. Functions

book
while loop (1/2)

Sometimes you need your code to run all the time when the condition holds. For example, in real life, we don't quit the metro train till we reach our station. I.e. if we need "Station B" we will miss "Station A", "Station C" and so on, until we reach "Station B". In Python you can write something like this using while loop:

12
while condition: do
copy

For example, we can print all the numbers to 10.

1234567
# assign starting number i = 1 # while loop will print all the numbers to 10 while i < 10: # condition print(i) # action i = i + 1 # increasing variable
copy

You might notice, that we use i = i + 1 inside the loop. If we didn't specify that, our loop would be infinite, as every time it checked condition it got 1 < 10, which is True. Be careful while using this type of loop in order not to make your code execution infinite.

Tâche

Swipe to start coding

  1. Create variable i with value 1.
  2. Using while loop print all the numbers less than 10 squared. Do not forget to increase your number on each step!

Solution

Switch to desktopPassez à un bureau pour une pratique réelleContinuez d'où vous êtes en utilisant l'une des options ci-dessous
Tout était clair ?

Comment pouvons-nous l'améliorer ?

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Section 6. Chapitre 1
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book
while loop (1/2)

Sometimes you need your code to run all the time when the condition holds. For example, in real life, we don't quit the metro train till we reach our station. I.e. if we need "Station B" we will miss "Station A", "Station C" and so on, until we reach "Station B". In Python you can write something like this using while loop:

12
while condition: do
copy

For example, we can print all the numbers to 10.

1234567
# assign starting number i = 1 # while loop will print all the numbers to 10 while i < 10: # condition print(i) # action i = i + 1 # increasing variable
copy

You might notice, that we use i = i + 1 inside the loop. If we didn't specify that, our loop would be infinite, as every time it checked condition it got 1 < 10, which is True. Be careful while using this type of loop in order not to make your code execution infinite.

Tâche

Swipe to start coding

  1. Create variable i with value 1.
  2. Using while loop print all the numbers less than 10 squared. Do not forget to increase your number on each step!

Solution

Switch to desktopPassez à un bureau pour une pratique réelleContinuez d'où vous êtes en utilisant l'une des options ci-dessous
Tout était clair ?

Comment pouvons-nous l'améliorer ?

Merci pour vos commentaires !

Section 6. Chapitre 1
Switch to desktopPassez à un bureau pour une pratique réelleContinuez d'où vous êtes en utilisant l'une des options ci-dessous
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