python must memorize entry code

print("Hello World!")

# 定义变量并赋值 name = "Alice" age = 18 height = 1.65 is_student = True # 打印变量 print(name) print(age) print(height) print(is_student) # 数据类型转换 age_str = str(age) height_int = int(height) is_student_str = str(is_student)

# 输入字符串 name = input("请输入您的姓名：") print("您的姓名是：", name) # 输入数字 age = int(input("请输入您的年龄：")) print("您的年龄是：", age)

age = int(input("请输入您的年龄：")) if age >= 18: print("您已经成年了!") else: print("您还未成年!")

# while循环 count = 0 while count < 5: print("当前计数：", count) count += 1 # for循环 for i in range(5): print("当前计数：", i)

# 列表 fruits = ['apple', 'banana', 'orange'] print(fruits[0]) # 输出apple fruits.append('grape') # 添加元素 print(fruits) # 输出['apple', 'banana', 'orange', 'grape'] # 字典 person = {'name': 'Alice', 'age': 18, 'gender': 'female'} print(person['name']) # 输出Alice person['height'] = 1.65 # 添加键值对 print(person) # 输出{'name': 'Alice', 'age': 18, 'gender': 'female', 'height': 1.65}

# 定义函数 def greet(name): print("Hello,", name) # 调用函数 greet("Alice")

try: num = int(input("请输入一个数字：")) result = 10 / num print("结果：", result) except ZeroDivisionError: print("除数不能为0!") except ValueError: print("请输入一个有效的数字!")