Python Tutorials · Python While Loops

Python While Loops

Learn all about Python While Loops in this comprehensive tutorial.

5 min read beginner

•Python has two primitive loop commands:
•With the while loop we can execute a set of statements as long as a condition is true.
•With the break statement we can stop the loop even if the while condition is true:
•With the continue statement we can stop the current iteration, and continue with the next:
•With the else statement we can run a block of code once when the condition no longer is true:

Python Loops

Python has two primitive loop commands:

With the while loop we can execute a set of statements as long as a condition is true.

python

i = 1
while i < 6:
  print(i)
  i += 1

Note: Note: remember to increment i, or else the loop will continue forever.

The while loop requires relevant variables to be ready, in this example we need to define an indexing variable, i, which we set to 1.

With the break statement we can stop the loop even if the while condition is true:

python

i = 1
while i < 6:
  print(i)
    if i == 3:    break  i += 1

With the continue statement we can stop the current iteration, and continue with the next:

python

i = 0
while i < 6:
    i += 1
  if i == 3:    continue  print(i)

With the else statement we can run a block of code once when the condition no longer is true:

python

i = 1
while i < 6:
  print(i)
  i += 1else:  print("i is no longer less than 6")

Note: Note: The else block will NOT be executed if the loop is stopped by a break statement.

2 questions

Which of the following is true about Python While Loops?

It is strictly typedIt is evaluated at runtimeIt requires explicit memory managementIt is deprecated

What is the most common pitfall when working with Python While Loops?

SyntaxErrorIndentationErrorNameErrorTypeError

Answer all questions to submit.