Learning the path to Python: logical operators

Logical operations

• In program development, execution results may be related to multiple conditions
• For example, if more than one condition is set up to execute, or if one condition can be executed, then a logical operator is required
• Logical operators can connect multiple conditions logically to become more complex conditions
• The logical operators in Python include: not three with and/or or/

1. and

条件1 and 条件2

• and/And
• Two conditions are met at the same time, returnTrue
• As long as there is one unsatisfied, returnFalse

Condition 1	Condition 2	Results
Was founded	Was founded	Was founded
Was founded	Not established	Not established
Not established	Was founded	Not established
Not established	Not established	Not established

2. or

条件1 or 条件2

• OR/or
• Two conditions as long as there is a satisfaction, returnTrue
• Two conditions are not satisfied, returnFalse

Condition 1	Condition 2	Results
Was founded	Was founded	Was founded
Was founded	Not established	Was founded
Not established	Was founded	Was founded
Not established	Not established	Not established

3. not

not 条件

• Non/Not

conditions	Results
Was founded	Not established
Not established	Was founded

Logical Operations Walkthrough

1. Exercise 1: Define an Integer variable age and write code to determine whether the age is correct
   • Requires a person's age between 0-120
2. Exercise 2: Define two integer variables, python_score c_score write code to judge scores
   • Requires as long as there is a score > 60 points even if qualified
3. Exercise 3: Define a Boolean variable is_employee , write code to determine whether the company's employees
   • If not prompt not allowed in

Answer 1:

# 练习1: 定义一个整数变量 age，编写代码判断年龄是否正确age = 100# 要求人的年龄在 0-120 之间if age >= 0 and age <= 120: print("年龄正确")else: print("年龄不正确")

Answer 2:

# 练习2: 定义两个整数变量 python_score、c_score，编写代码判断成绩python_score = 50c_score = 50# 要求只要有一门成绩 > 60 分就算合格if python_score > 60 or c_score > 60: print("考试通过")else: print("再接再厉！")

Answer 3:

# 练习3: 定义一个布尔型变量 `is_employee`，编写代码判断是否是本公司员工is_employee = True# 如果不是提示不允许入内if not is_employee: print("非公勿内")

Learning python path: logical operators