Python comes with two inbuilt keywords to interrupt loop iteration,breakandcontinue. Break Keyword In While loop The break keyword immediately terminates the while loop. Let's add a break statement to our existing code, x =1while(x<=3):print(x) x = x +1ifx ==3:breakelse:print("x is...
while陳述句(statement)所建立的迴圈不像for迴圈,需要在一定的範圍內迭代;也不像if陳述句,只存在執行一次或不執行的狀況。只要陳述的條件為真True,while迴圈就會持續到天荒地老,或者電腦當掉。 如果你對for迴圈或if陳述句不熟悉,可以閱讀〈Python for 迴圈(loop)的基本認識與7種操作〉、〈Python if 陳述句的...
The while loop statement is used to repeat a block of code till a condition is fulfilled. When we don’t know the exact number of times, a loop statement has to be executed. We make use of while loops. This way, till the test expression holds true, the loop body will be executed. ...
Here, the condition of the while loop is alwaysTrue. However, if the user entersend, the loop termiantes because of thebreakstatement. Pythonwhileloop with anelseclause In Python, awhileloop can have an optionalelseclause - that is executed once the loop condition isFalse. For example, coun...
The basic loop structure in Python is while loop. Here is the syntax.Syntax:while (expression) : statement_1 statement_2 ...The while loop runs as long as the expression (condition) evaluates to True and execute the program block. The condition is checked every time at the beginning of...
Note:remember to increment i, or else the loop will continue forever. Thewhileloop requires relevant variables to be ready, in this example we need to define an indexing variable,i, which we set to 1. The break Statement With thebreakstatement we can stop the loop even if the while condi...
Python programming language provides while, for and nested loops to handle looping requirements, but in this tutorial, we will talk only about while loops.While loop statement in Python language repeatedly executes a target statement as long as a given condition is true. While syntax: The syntax...
whileWhile loopscontinue to loop through a block of code provided that the condition set in thewhilestatement is True. From here, you can continue to learn about looping by reading tutorials onand. Python is a flexible and versatile programming language that can be leveraged for many use cases...
print("In the loop") 这个程序将无限期地打印“In the loop”。 您可以使用Ctrl-C快捷方式或关闭程序来停止程序的执行。 break#中断 To end a while loop prematurely, the break statement can be used. When encountered inside a loop, the break statement causes the loop to finish immediately. ...
Python does not have a built-in "do-while" loop, but you can emulate its behavior. Emulating Do-While Behavior To emulate a "do-while" loop in Python, you can use a while loop with a True condition and strategically place a break statement. Here's an example: while True: # Execute...