def for_loop(n=100_000_000): s = 0 for i in range(n): s += i return s def main(): print('while loop\t\t', timeit.timeit(while_loop, number=1)) print('for loop\t\t', timeit.timeit(for_loop, number=1)) if __name__ == '__main__': main() # => while loop 4.71...
def for_loop(n=100_000_000): s = 0 for i in range(n): s += i return s def main(): print('while loop\t\t', timeit.timeit(while_loop, number=1)) print('for loop\t\t', timeit.timeit(for_loop, number=1)) if __name__ == '__main__': main() # => while loop 4.71...
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...
After that, we test what the user entered to see if it matches the ship’s location. If it does, Python says “It’s a hit!” and ends the loop. Otherwise, we just put an X on the grid so the user knows he already tried that place. Line 40 takes away one torpedo. Lines 42 ...
Python for loop and while loop #!pyton2#-*- coding:utf-8 -*-forletterin"Python":print"Current letter is:",letter fruits=["apple","mango","pear"]forfruitinfruits:printfruitforindexinrange(len(fruits)):printfruits[index]>python2 test.py...
来自http://www.runoob.com/python/python-while-loop.html PythonWhile 循环语句 Python 编程中 while 语句用于循环执行程序,即在某条件下,循环执行某段程序,以处理需要重复处理的相同任务。其基本形式为: while判断条件:执行语句…… 执行语句可以是单个语句或语句块。判断条件可以是任何表达式,任何非零、或非空(...
图6-5-1 brak 和 continue 语句用 break 语句将前面“死循环”的程序改造如下: #coding:utf-8 ''' whileloop.py ''' n = 0 while 1...执行效果: % python whileloop.py laoqi laoqi loop end 对照程序代...
#coding:utf-8''' whileloop.py''' n=0while1:n+=1ifn>=3:#(1)breakprint('laoqi')print('loop end')#(2) 执行效果: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 %python whileloop.py laoqi laoqi loop end 对照程序代码和执行结果,当满足注释(1)时,即执行其下的break,从而避免无限循环...
/usr/bin/python # -*- coding: UTF-8 -*- var = 1 while var == 1 : # 该条件永远为true,循环将无限执行下去 num = raw_input("Enter a number :") print "You entered: ", num print "Good bye!" 1. 2. 3. 4. 5. 6. 7....
# -*- coding:utf-8 -*- print('请任意输入一个数字：') number = int( input() ) ...