标签:idc class 判断 == 语句 偶数 highlight 密码 nbsp
自学之后运用循环语句和判断语句所解决的几个简单问题:
1、实现1到10的和:
x = 1 he = 0 while x < 11: if x == 7: pass else: he = he + x x = x + 1 print(he)
2、实现1到100的和:
x=1 he =0 while x< 101: he=x+he x=x+1 print(he)
3、实现100以内偶数相加:
x = 1 while x < 101: if x % 2 == 0: print(x) else: pass x = x + 1
4、实现100以内的奇数相加:
x = 1 while x < 101: if x % 2 == 0: pass else: print(x) x = x + 1
5、实现求1-2+3-4+5 ... 99的所有数的和:
x = 1 he = 00 while x < 100: if x % 2 == 0: he = he - x else: he = he + x x = x + 1 print(he)
6、实现三次登陆尝试:
纯IF语句版:
idcard = 123 passward = 123 x = 0 a = input("请输入你的账号") c = input("请输入你的密码") if a == idcard and c == passward: print("成功登陆") else: print("登陆失败") a = input("请输入你的账号") c = input("请输入你的密码") if a == idcard and c == passward: print("成功登陆") else: print("登陆失败") a = input("请输入你的账号") c = input("请输入你的密码") if a == idcard and c == passward: print("成功登陆") else: print("三次登陆失败,强制退出")
添加 while循环版:
idcared= 123 passward = 123 x = 0 while x < 3: a = input("请输入你的账号") c = input("请输入你的密码") if a == idcard and c == passward: print("成功登陆") else: print("登陆失败 请重新输入") if x==2 : print("输入三次失败,强制退出") x = x + 1
经过这几个问题的简单尝试总结了 1、常常会忘记添加循环的限制变量。 2、不注意代码当中的缩进量。
标签:idc class 判断 == 语句 偶数 highlight 密码 nbsp
原文地址:https://www.cnblogs.com/chenansen/p/9471880.html