5-3 外星人颜色#1
alien_color='green' if alien_color=='green': print("You win five points") alien_color='red' if alien_color=='green': print("You win five points")
5-5 外星人颜色#5
alien_color='green' if alien_color=='green': print("You win five points") elif alien_color=='yellow': print("You win ten points") else: print("You win fifteen points") alien_color='yellow' if alien_color=='green': print("You win five points") elif alien_color=='yellow': print("You win ten points") else: print("You win fifteen points") alien_color='red' if alien_color=='green': print("You win five points") elif alien_color=='yellow': print("You win ten points") else: print("You win fifteen points")
5-7 喜欢的水果
favorite_friuts=['apple','banana','orange'] for fruit in favorite_friuts: if fruit=='apple': print("You really like apple") elif fruit=='banana': print("You really like banana") elif fruit=='orange': print("You really like orange") elif fruit=='strawberry': print("You really like strawberry") elif fruit=='watermelon': print("You really like watermelon")
5-10 检查用户名
current_users=['Mike','Kate','Ben','Joe','Dan'] new_users=['Joe','Alice'] for user in new_users: if user in current_users: print("You need to enter another name.") else: print(user+' is not being used.')