二、解法:切片 A simple way to reverse a string would be to create a new string and fill it with the characters from the original string, but backwards. To do this, we need to loop through the original string starting from the end, and every iteration of the loop we move to the previ...
2. Use reversed() Function Get For Loop in Backwards Python provides easiest way to implement the loop iteration in backward directions usingreversed()function. Usually loop iterations start from front side if you want to get the loop iterations from back side rather than the front side you can...
這篇文章將討論如何在 Python 中向後循環。 1.使用range()功能 在Python 中向後迭代的 Pythonic 方法是使用rangestep 參數為 -1 的構造函數。這是其用法的簡單示例: 1 2 3 4 5 6 if__name__=='__main__': #倒序打印1到10的數字 foriinrange(10,0,-1): ...
To loop over a sequence in reverse, first specify the sequence in a forward direction and then call the reversed() function. : 需要逆向循环序列的话,先正向定位序列,然后调用 reversed() 函数 >>> for i in reversed(xrange(1,10,2)): ... print i ... 9 7 5 3 1 To loop over a seque...
string ='Stechies'# Print Original and Reverse stringprint('Original String: ', string)print('Reverse String: ', reverse_for(string)) Output: Original String: Stechies Reverse String: seihcetS Explanation: In the above example, we use for loop to iterates through every character of the str...
# loop fell through without finding a factor ... print(n, 'is a prime number') ... 2 is a prime number 3 is a prime number 4 equals 2 * 2 5 is a prime number 6 equals 2 * 3 7 is a prime number 8 equals 2 * 4 9 equals 3 * 3 (是的,这是正确的代码,仔细一看:该...
We can also use a negative value for ourstepargument to iterate backwards, but we’ll have to adjust ourstartandstoparguments accordingly: foriinrange(100,0,-10):print(i) Copy Here, 100 is thestartvalue, 0 is thestopvalue, and-10is the range, so the loop begins at 100 and ends at...
break ... else: ... # loop fell through without finding a factor ... print n, 'is a prime number' ... 2 is a prime number 3 is a prime number 4 equals 2 * 2 5 is a prime number 6 equals 2 * 3 7 is a prime number 8 equals 2 * 4 9 equals 3 * 3...
self.robot.forward(0.2)defmove_backwards(self): self.robot.backward(0.2)defturn_right(self): self.robot.right(0.2)defturn_left(self): self.robot.left(0.2)defdance(self): self.move_forward() sleep(0.5) self.stop() self.move_backwards() ...
A lot of Python 3 controversy was about breaking the backwards compatibility for string literals and how Unicode is dealt with. Starting from Python 3.0, every un-prefixed string literal is Unicode. So, literals enclosed by single quotes ('), double quotes ("), or groups of three quotes (...