python语句，,基本逻辑运算符（if

python语句，,基本逻辑运算符（if

基本逻辑运算符（if ...elif...else）(0,False,None为假)

flag = Falsename = ‘luren‘if name == ‘python‘:         # 判断变量否为‘python‘    flag = True          # 条件成立时设置标志为真    print(‘welcome boss‘)    # 并输出欢迎信息else:    print(name)              # 条件不成立时输出变量名称

 1 num = 5      2 if num == 3:            # 判断num的值 3     print(‘boss‘)         4 elif num == 2: 5     print(‘user‘) 6 elif num == 1: 7     print(‘worker‘) 8 elif num < 0:           # 值小于零时输出 9     print(‘error‘)10 else:11     print(‘roadman‘)     # 条件均不成立时输出

 1 num = 9 2 if num >= 0 and num <= 10:    # 判断值是否在0~10之间 3     print(‘hello‘) 4 # 输出结果: hello 5   6 num = 10 7 if num < 0 or num > 10:    # 判断值是否在小于0或大于10 8     print(‘hello‘) 9 else:10     print(‘undefine‘)11 # 输出结果: undefine12  13 num = 814 # 判断值是否在0~5或者10~15之间15 if (num >= 0 and num <= 5) or (num >= 10 and num <= 15):    16     print(‘hello‘)17 else:18     print(‘undefine‘)19 # 输出结果: undefine

age = 16high = 170success = Trueif age:    print(‘ok‘)else:    print(‘不OK‘)if age > 17:    if success:        print(‘咱们结婚吧！‘)    else:        print(‘去他妈的爱情！‘)elif high > 160:    print(‘你好高‘)else:    print(‘不表白‘)

 score=input(‘>>: ‘) > 90:优秀 80 < 90 :良好 >=60 <80 :合格 <60:滚犊子 score = int(input(‘请输入你的成绩:‘)) if score > 90:     print(‘优秀‘) elif score > 80 and score <= 90:     print(‘良好‘) elif score >=60 and score < 80:     print(‘合格‘) else:     print(‘滚犊子‘)

python语句