How to use while True in Python
Published on Aug. 22, 2023, 12:15 p.m.
In Python, the while True
loop is a commonly used construct that allows you to write an infinite loop that continues executing until a break
statement is encountered. The syntax for using while True
is as follows:
while True:
# do something indefinitely
if some_condition:
break # exit the loop if some condition is met
In this example, we use while True
to create an infinite loop that continues executing until a break
statement is encountered. Inside the loop, we can execute any code we want, such as reading user input, processing data, or performing calculations. The loop will continue executing until we encounter a break
statement or an exception is raised.
while True
can be a powerful and versatile tool, but it should be used with caution. It is important to make sure that the loop eventually exits to avoid infinite loops that can cause programs to crash or hang. It is also important to carefully control when the break
statement is used to avoid unexpected or unintended behavior.
To use while True
in Python, you can use the following syntax:
while True:
# Code to execute indefinitely
if some_condition:
break # Exit the loop if some condition is met
In this example, the flow of execution will enter the while True
loop and continue executing until it encounters a break
statement or an unhandled exception occurs. Inside the loop, you can execute any code that you want to repeat indefinitely.
It’s important to ensure that some condition is eventually met to exit the loop, otherwise the loop will execute indefinitely. You can use an if
statement inside the loop to check for a condition and use the break
statement to exit the loop when that condition is met.
It’s also important to note that an infinite loop can be dangerous, especially if your code is running on a server, and can cause your program to crash or hang if not properly handled. Always use while True
with caution and make sure it is used correctly to avoid unintended or unintended behavior.