Was ist die Auswahlanweisung in Python?

if语句 格式: if 表达式: 语句块(执行代码)

if...else语句 格式: if 表达式: 语句块 else: 语句块

if...elif...else多分支语句 格式: if 表达式1: 语句块1 elif 表达式2: 语句块2 elif 表达式3: 语句块3 ... else: 语句块n

# if 实例 print("今有物不知其数,三三数之剩二,五五数之剩三,七七数之剩二,问几何?") num = int(input("请输入你认为符合条件的数字:")) if (num % 3 == 2) and (num % 5 == 3) and (num % 7 == 2): print(num,"符合三三数之剩二,五五数之剩三,七七数之剩二") # if...else 实例 print("今有物不知其数,三三数之剩二,五五数之剩三,七七数之剩二,问几何?") num = int(input("请输入你认为符合条件的数字:")) if (num % 3 == 2) and (num % 5 == 3) and (num % 7 == 2): print(num,"符合三三数之剩二,五五数之剩三,七七数之剩二") else: print(num,"不符合!")