# => for loop with increment 4.602369500091299 # => for loop with test 4.18337869993411 可以看出,增加的边界检查和自增操作确实大大影响了For循环的执行效率。前面提到过,Python底层的解释器和内置函数是用C语言实现的。而C语言的执行效率远大于Python。对于上面的求等差数列之和的操作,借助于Python内置的Sum函数...
print('for loop\t\t', timeit.timeit(for_loop, number=1)) print('for loop with increment\t\t', timeit.timeit(for_loop_with_inc, number=1)) print('for loop with test\t\t', timeit.timeit(for_loop_with_test, number=1)) if __name__ == '__main__': main() # => while loop...
timeit.timeit(for_loop_with_inc, number=1)) print('for loop with test\t\t', timeit.timeit(for_loop_with_test, number=1)) if __name__ == '__main__': main() # => while loop 4.718853999860585 # => for loop 3.211570399813354 # => for loop with increment 4.602369500091299 # => f...
Increment the sequence with 3 (default is 1): 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...
# don't forget to increment `i` manually i += 1 类比C码 您想象的是,您在python中的for-loop类似于以下C代码: for (int i = 0; i < 10; i++) if (i == 5) i += 3; 它更像是C代码: int r[] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]; ...
defmain():print('while loop\t\t',timeit.timeit(while_loop,number=1))print('for loop\t\t',timeit.timeit(for_loop,number=1))print('for loop with increment\t\t',timeit.timeit(for_loop_with_inc,number=1))print('for loop with test\t\t',timeit.timeit(for_loop_with_test,number=1))...
这应该是Python独有的特性吧,循环也可以有else。当循环正常结束(没有break)后,就会执行else代码段: for i in range(3): print(i) else: print('loop ends') for i in range(3): if i > 1: break print(i) else: print('loop ends')
# Take user input number = 2 # Condition of the while loop while number < 5 : print("Thank you") # Increment the value of the variable "number by 1" number = number+1 Powered By Thank you Thank you Thank you Powered By The code example above is a very simple while loop: ...
1、Python 进阶应用教程 2、Python 办公自动化教程 🐬 推荐阅读6个 1、快速获取JSON值-JSON解析器for Go2、SQL Primary Key & Foreign Key3、在Go中快速设置JSON值4、JSON的函数sed5、地图Caps Lock to Escape或any key to any key6、一个简单的bash脚本,用于在每次git提交时自动生成CHANGELOG.md文件。
C++版本 //Counter-controlled repetition with the for statement#include<iostream>usingstd::cout;usingstd::endl;intmain() {//for statement header includes initialization//loop-continuation condition and incrementfor(intcounter =1; counter <=10; counter++) ...