With other iterable objects, range() is flexible. While loops, characterized by 'while condition:', proceed until the condition evaluates to false, allowing for single or block statements. 'continue' and 'break'
forxinrange(2,30,3): print(x) Try it Yourself » Else in For Loop Theelsekeyword in aforloop specifies a block of code to be executed when the loop is finished: Example Print all numbers from 0 to 5, and print a message when the loop has ended: ...
在Python中,range函数用于生成一个整数序列,常用于for循环中控制循环次数。range函数可以接受一个或多个参数,包括起始值、结束值和步长。 当需要在for循环中迭代一定次数时,可以使用r...
范围是不可变的整数序列,通常用于for循环。 Ranges are immutable sequences of integers,and they are commonly used in for loops. 要创建一个范围对象,我们键入“range”,然后输入范围的停止值。 To create a range object, we type "range" and then we put in the stopping value of the range. 现在,我...
Here, range(0, 4) returns a sequence of 0, 1, 2 ,and 3. Since the range() function returns a sequence of numbers, we can iterate over it using a for loop. For example, # iterate from i = 0 to i = 3 for i in range(0, 4): print(i) Run Code Output 0 1 2 3 Here,...
foriinrange(my_list_length): output_list.append(i * 2) returnoutput_list 通过将列表长度计算移出for循环,加速1.6倍,这个方法可能很少有人知道吧。 # Summary Of Test Results Baseline: 112.135 ns per loop Improved: 68.304 ns per loop % Improvement: 39.1 % ...
如果需要依靠列表的长度进行迭代,请在for循环之外进行计算。 # Baseline version (Inefficient way) # (Length calculation inside for loop) def test_02_v0(numbers): output_list = [] for i in range(len(numbers)): output_list.append(i * 2) ...
foriinrange(my_list_length): output_list.append(i*2) returnoutput_list 通过将列表长度计算移出for循环,加速1.6倍,这个方法可能很少有人知道吧。 # Summary Of Test Results Baseline: 112.135 ns per loop Improved: 68.304 ns per loop % Improvement: 39.1 % ...
for num in range(10): if num == 5: break print(num) # 只打印0-4 continue:跳过当前迭代,继续下一次循环 for num in range(10): if num % 2 == 0: continue print(num) # 只打印奇数 else:循环正常结束后执行(非break退出时) for num in range(5): print(num) else: print("Loop complet...
在Python中,for循环用以下的格式构造: for[循环计数器]in[循环序列]:[执行循环任务] Copy [循环任务]在循环序列用尽之前,将会将一直被执行。 我们来看看这个例子中,如何用for循环去重复打印一个区间内的所有数字: foriinrange(0,5):print(i) Copy