while

In programming, the while loop is used to repeatedly execute a block of code as long as a certain condition is True.

The syntax for a while loop in Python is as follows:

while condition:
   # code to be executed while condition is True

Here, condition is an expression that evaluates to a boolean value (either True or False). The while loop will continue to execute the code inside the loop as long as the value of the condition is True.

It is important to include a statement inside the while loop that will eventually make the value of the condition False, otherwise the loop will continue to execute indefinitely and you will have an infinite loop.

Here is an example of how you can use a while loop in Python:

x = 5
while x > 0:
   print(x)
   x -= 1

This while loop will print the numbers 5, 4, 3, 2, and 1, and then exit the loop because the value of x will become 0 (since x -= 1 is equivalent to x = x - 1).

You can use the break statement inside a while loop to exit the loop early, and the continue statement to skip the rest of the current iteration and move on to the next one.