《Python编程：从入门到实践》第五章 if语句 习题答案

#5.1
major = ‘Software Engineering‘
print("Is major ==‘Software Engineering‘? I predict True.")
print(major==‘Software Engineering‘)

print("Is major ==‘Software Engineering‘? I predict False.")
print(major==‘Computer Science‘)
#5.2
print("--------------------------------------")
string_1=‘abc‘
string_2=‘abc‘
string_3=‘abcd‘
print("Is string_1==string_2? ")
print(string_1==string_2)
print("Is string_2==string_3?")
print(string_2==string_3)
print("--------------------------------------")
print("Is string_1 == string_1.lower()?")
print(string_1==string_1.lower())
print("--------------------------------------")
print("这个部分实在过于简单和麻烦，略过！")
print("--------------------------------------")
print(True and False)
print(True and True)
print(False and False)
print(True or False)
print(True or True)
print(False or False)
print("--------------------------------------")
mobileInc = [‘apple‘,‘xiaomi‘,‘huawei‘,‘oppo‘,‘vivo‘]
print(‘apple‘ in mobileInc)
print(‘coolpad‘ in mobileInc)
print(‘nokia‘ not in mobileInc)

#5.3
alien_color = ‘green‘
if alien_color == ‘green‘:
    print("Great!You got 5 point!")
alien_color = ‘red‘
if alien_color == ‘green‘:
    print("Great!You got 5 point!")
print("------------------------------------")
#5.4
alien_color = ‘green‘
if alien_color == ‘green‘:
    print("Great!You got 5 point!")
else:
    print("Excellent!You got 10 point!")
alien_color = ‘red‘
if alien_color == ‘green‘:
    print("Great!You got 5 point!")
else:
    print("Excellent!You got 10 point!")
print("-----------------------------------------")
#5.5
alien_color = ‘green‘
if alien_color == ‘green‘:
    print("Great!You got 5 point!")
elif alien_color == ‘yellow‘:
    print("Excellent!You got 10 point!")
elif alien_color == ‘red‘:
    print("Oh,my god!You got 15 point!")


alien_color = ‘yellow‘
if alien_color == ‘green‘:
    print("Great!You got 5 point!")
elif alien_color == ‘yellow‘:
    print("Excellent!You got 10 point!")
elif alien_color == ‘red‘:
    print("Oh,my god!You got 15 point!")


alien_color = ‘red‘
if alien_color == ‘green‘:
    print("Great!You got 5 point!")
elif alien_color == ‘yellow‘:
    print("Excellent!You got 10 point!")
elif alien_color == ‘red‘:
    print("Oh,my god!You got 15 point!")
print("-----------------------------------------")

#5.6
age = 33
if age < 2:
    print("婴儿")
elif age>=2 and age<4:
    print("蹒跚学步")
elif age>=4 and age<13:
    print("儿童")
elif age>=13 and age<20:
    print("青少年")
elif age>=20 and age<65:
    print("成年人")
elif age>=65:
    print("老年人")

#5.7
favourite_fruits = [‘apple‘,‘banana‘,‘orange‘]
if ‘apple‘ in favourite_fruits:
    print("You really like apples!")
if ‘banana‘ in favourite_fruits:
    print("You really like bananas!")
if ‘orange‘ in favourite_fruits:
    print("You really like orange!")
if ‘watermalen‘ in favourite_fruits:
    print("You really like watermalen!")
if ‘grape‘ in favourite_fruits:
    print("You really like grape!")