while loop - 无限循环 如果条件从未变为假,则循环成为无限循环。在使用While循环时必须谨慎,因为此条件可能永远不会解析为False值。这导致了一个永无止境的循环。这样的循环称为无限循环。 #!/usr/bin/python var=1 while var == 1 : # This constructs an infinite loop num=raw_input("Enter a number :...
enumfblocktype{WHILE_LOOP,FOR_LOOP,LOOP_LOOP,TRY_EXCEPT,FINALLY_TRY,FINALLY_END,WITH,ASYNC_WITH,HANDLER_CLEANUP,POP_VALUE,EXCEPTION_HANDLER,EXCEPTION_GROUP_HANDLER,ASYNC_COMPREHENSION_GENERATOR}; 并在第4050行添加如下代码 caseLoop_kind:returncompiler_loop(c,s); 再在第3232行添加如下代码 staticintcom...
Example: while loop with if-else and break statementx = 1; s = 0 while (x < 10): s = s + x x = x + 1 if (x == 5): break else : print('The sum of first 9 integers : ',s) print('The sum of ',x,' numbers is :',s) Copy...
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...
Exit the loop when i is 3: i =1 whilei <6: print(i) ifi ==3: break i +=1 Try it Yourself » The continue Statement With thecontinuestatement we can stop the current iteration, and continue with the next: Example Continue to the next iteration if i is 3: ...
First, create awhilewith a condition that is always true. The simplest way is shown. Using anifstatement, you define thestoppingcondition. Inside theif, you writebreak, meaning "exit the loop." The difference here is that this loop isguaranteedto run at least once. ...
Note: you can solve this task more elegantly with a while loop. However, I haven’t written a while loop tutorial yet, which is why I went with the for loop +breaksolution! Test Yourself! It’s time to test whether you have managed to master the if statement, the for loops and the...
In this tutorial, you'll learn about indefinite iteration using the Python while loop. You’ll be able to construct basic and complex while loops, interrupt loop execution with break and continue, use the else clause with a while loop, and deal with infi
statement(s) 1. 2. while 的简单例子: # Simple Example for Python While Loop a = 4 i = 0 while i < a: print(i) i += 1 1. 2. 3. 4. 5. 6. 执行与输出: while 和 break 的例子: # While Loop with Break a = 4 i = 0 ...
In order to compute theaverage you will be accumulating the sum of the integers entered inside the while loop. When the users enters “N" the program should quit the while loop and proceed with the computation of the average of the numbers. In this processing, if the count of the numbers...