Exercise 6: While loop

A while loop repeats code until the condition is met. Unlike for loops, the number of iterations in it may be unknown.  A while loop always consists of a condition and a block of code.

A while loop ends if and only if the condition is true, in contrast to a for loop that always has a finite countable number of steps. For illustration: If you create a program that waits for network connectivity, you could use a while loop.

Type this code:

x = 3                              
while x < 10:
    x = x + 1

Executes the code below until the condition x < 10 is met.   Unlike a for loop, the iterator i is increased in the loop.

Related: Complete Python Bootcamp: Go from zero to hero in Python

Exercise 5: For Loops
Exercise 7: Functions