一、判斷

1、條件判斷

age = 18
if age >= 18:
    print(‘your are is‘, age)
    print(‘adult‘)


age = 3

if age >= 18:
    print(‘your are is‘, age)
    print(‘adult‘)

elif age >= 6:
    print(‘your are is‘, age)
    print(‘Sarah‘)

elif age >= 3:
    print(‘your are is‘, age)
    
 
print(‘Jack‘)

else:
    print(‘your are is‘, age)
    print(‘mike‘)


# 註意:
# input()返回的是字符串
# 必須通過int()將字符串轉換為整數
# 才能用於數值比較:
age = int(input(‘Input your age:‘))
if age >= 18:
    print(‘your are is‘, age)
    print(‘adult‘)

elif age >= 6:
    print(‘your are is‘, age)
    
 
print(‘Sarah‘)

elif age >= 5:
    print(‘your are is‘, age)
    print(‘Jack‘)

else:
    print(‘your are is‘, age)
    print(‘mike‘)

廖雪峰網站—學習python基礎知識（三）