python连载第11篇 if 语句

#python连载第11篇 if 语句
#if单个选择测试,两个print是一个代码块，所以都要执行
age = 17
if age > 10:
    print("you are old enough to enjoy love with TA")
    print("you can do some wonderful things")


#if一个测试，多个选择语句例子
age = 150
if age < 50:
    print("the train ticket is free")
elif age == 50:
    print("the train ticket is free")
elif age < 120:
    print("the train ticket is half price")
elif age == 120:
    print("the train ticket is half price")
else:
    print("the train ticket is full price")     #身高大于120cm，所以全价票
#if 嵌套
num = int(input("please input an integer："))    
if num%5 == 0:
    if num%6 == 0:
        print ("the number you input can be exact divided by  5 and 6")
    else:
        print ("the number you input can be exact divided by  5，but not by 6")
else:
    if num%6 == 0:
        print ("the number you input can be exact divided by  6，but not by 5")
    else:
        print  ("the number you input can not be exact divided by 5 and 6")



2017-11-26 16:56:48 November Sunday the 47 week, the 330 day
#if的例子，检查字符串
if 'python' == 'Python':
    print("'python' == 'Python'")
else:
    print("'python' != 'Python'")       #不相等哈，字母有大小写分别
if 'love' in "I love you":              #in 包含的意思，一个小东西是否在大东西里面
    print("'love' is in 'I love you'")
else:
    print("'love' is not in 'I love you'")

if 'leben' not in "I love you":         #not in 不包含的意思，小数据是否不在大数据里
    print("'leben' is not in 'I love you'")
else:
    print("'leben' is in 'I love you'")
#检查数字：
if 10 <= 6:
    print("10 <= 6 is true")
else:
    print("10 <= 6 is false")
#检查多个条件
if 10 > 6 and 10 >9:            #and 代表并且，两个条件都成立才是真
    print('10 > 6 and 10 >9 is true')
else:
    print("10 > 6 and 10 >9 is false")

if 10 > 6 or 10 < 9:            #or代表或，有一个条件成立就是真
    print('10 > 6 or 10 >9 is true')
else:
    print("10 > 6 or 10 >9 is false")