The range() function is typically used with a while loop to repeat a block of code for all values within a range. Let’s discuss different scenarios of using the range() function with a while loop in Python. By specifying start, stop, and step parameters, By excluding the start and ste...
Python for loop vs while loop Thefor loopis usually used in the sequence when the number of iterations is known. For example, # loop is iterated 4 times for i in range(4): print(i) Output 0 1 2 3 Thewhileloop is usually used when the number of iterations is unknown. For example,...
Hence, the loop terminates when thenumbervariable equals to6. Therefore, only the numbers1to5are printed. Example 3: while Loop With next Statement You can use thenextstatement in awhileloop to skip an iteration even if the test condition isTRUE. For example, number=1#whileloop to print o...
but we know the condition which determines the execution of the loop body. Whereas for loops are particularly used toiterate over a sequence. When you know the number of times the loop has to be executed, then using a range function in for loop, we can achieve that. ...
count +=1ifcount ==3:breakprint("Loop",count)else:print("循环正常执行完啦")print("---out of while loop ---") 输出 Loop1Loop2---out ofwhileloop ---#由于循环被break打断了,所以不执行else后的输出语句 【八】range关键字 【1】语法 fori...
A loop with this behavior is commonly known as an infinite loop, although the name isn’t quite accurate because, in the end, you’ll have to terminate the loop somehow. You may write an infinite loop either intentionally or unintentionally. Intentional infinite loops are powerful tools ...
Using the Python for Loop with a Range The Python for statement is frequently used with the range keyword. When the range function is used to calculate the sequence, the loop keeps running as long as the iterator falls within the range. When used with the range function, the syntax for a...
for) or when the condition becomes false (with while),#but not when the loop is terminated by a break statement.print('prime number:')forninrange(2,10):forxinrange(2,n):ifn % x ==0:print(n,'equals', x,'*', n//x)breakelse:print(n,'is a prime number')#whileprint('loop'...
for循环使用的一个特例是range-based循环。 你需要做的是使用一些外部变量来标记你的当前状态。默认设置为false,因为如果循环正常退出,就意味着没有找到匹配项。如果找到匹配项,则在将flag设置为true后,"short-circuit“按break循环: bool is_vowel = false;for (int i = 0 ; i<10 ; i++) { if (x ==...
while和for是 Python 中常用的两种实现循环的关键字，它们的运行效率实际上是有差距的。比如下面的测试代码：importtimeitdefwhile_loop(n=100_000_000):i=0s=0whilei<n:s+=ii+=1returnsdeffor_loop(n=100_000_000):s=0foriinrange(n):s+=ireturnsdefmain():print('whileloop\t\t',...