这篇教程Python流程控制if条件选择与for循环写得很实用，希望能帮到您。
1、if条件选择# coding:utf-8num = 23if num>2:print("dayu")if num<2:print("xiaoyu")## if elseif num>10:print("D")else:print("A")## if elif elseif num < 10:print("D")elif num < 20:print("C")elif num < 30:print("B")else:print("A")## if 嵌套if num > 10:if num>20:if num >30:print("A")else:print("B")else:print("C")else:print("D")
2、for循环# coding:utf-8# Author:Yang Xiaopengfor i in (1,2,3,4,5,6,7,8):if i < 8:print(i,end="____")else:print(i)list1 = [1,2,3,4,5,6]for item in list1:if item / 2 == 1:print(item)for item in "asjhlafjhkllsadk":if item == 'k':print(item)else:print(item,end="_") 
3、while循环# coding:utf-8# Author:Yang Xiaopeng# 死循环"""while True:pass"""num = 1while num<10:print(num,end="_")num+=1 
4、break 及 continue- break: 结束循环
- continue 退出本轮循环，继续下一轮循环
# coding:utf-8# Author:Yang Xiaopengnum = 0while num<10:num += 1if num <=6:continueprint(num, end="_")print("")num =0while num<10:num = num + 1if num == 6:breakprint(num, end="_")
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