How do you apply the while loop statement in Python?

1 year ago
William Carter
2 minutes

In Python, the while loop is used to repeatedly execute a block of code until a certain condition is no longer met. The basic syntax is as follows:

while 条件:
    # 代码块

In this case, the condition is a Boolean expression. If the condition is True, the code block will be executed; if the condition is False, the loop ends and the code continues to execute the statements after the loop.

Here is a simple example demonstrating how to use a while loop statement.

count = 0
while count < 5:
    print("count:", count)
    count += 1

This code will output numbers from 0 to 4.

Within a loop, you can use the break statement to prematurely end the loop, or use the continue statement to skip the remaining code of the current iteration and move on to the next one.

count = 0
while count < 5:
    if count == 2:
        break
    print("count:", count)
    count += 1

After this piece of code outputs 0 and 1, the loop will end when count reaches 2 using the break statement.

count = 0
while count < 5:
    count += 1
    if count == 2:
        continue
    print("count:", count)

This code will output 1, 3, 4, and 5. When the count is equal to 2, the continue statement will skip the remaining code in the current loop and immediately move on to the next loop.

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