Example demonstration of Python operation symbols: Interpretation of common usage scenarios requires specific code examples

Introduction:

As a high-level programming language, Python has Rich arithmetic symbols. In daily development and data analysis, proficient use of these operators can improve programming efficiency and code readability. This article will focus on common operators in Python and demonstrate them with specific code examples to help readers better understand and use them.

1. Arithmetic operators

1. Addition operator ( )

The addition operator can be used to add two numbers, or it can be used For string concatenation.

Sample code:

Number addition

a = 5
b = 3
c = a b
print(c) # Output result: 8

String concatenation

str1 = "Hello"
str2 = "World!"
str3 = str1 " " str2
print(str3) # Output result: Hello World!

2. Subtraction operator (-)

The subtraction operator is used to subtract two numbers.

Sample code:

a = 10
b = 3
c = a - b
print(c) # Output result: 7

3. Multiplication operator (*)

The multiplication operator can be used to multiply two numbers or to repeat a string.

Sample code:

Number multiplication

a = 4
b = 3
c = a * b
print(c) # Output result ：12

String repetition

str1 = "Hello"
str2 = str1 * 3
print(str2) # Output result: HelloHelloHello

4. Division operator (/)

The division operator is used to divide two numbers, and the result will return a floating point number.

Sample code:

a = 10
b = 3
c = a / b
print(c) # Output result: 3.333333333333333

5. Remainder operator (%)

The remainder operator is used to obtain the remainder after dividing two numbers.

Sample code:

a = 10
b = 3
c = a % b
print(c) # Output result: 1

6. Power operator (**)

The power operator is used to calculate the exponent value of a number.

Sample code:

a = 2
b = 3
c = a ** b
print(c) # Output result: 8

2. Comparison operators

Comparison operators are used to compare the relationship between two values, and the result returns a Boolean value (True or False).

1. Equal operator (==)

The equal operator is used to determine whether two values ​​are equal.

Sample code:

a = 5
b = 5
print(a == b) # Output result: True

2. is not equal to Operator (!=)

The inequality operator is used to determine whether two values ​​are not equal.

Sample code:

a = 5
b = 3
print(a != b) # Output result: True

3. Greater than operation The greater than operator (>)

is used to determine whether a value is greater than another value.

Sample code:

a = 5
b = 3
print(a > b) # Output result: True

4. less than operation The less than operator (

is used to determine whether one value is less than another value.

Sample code:

a = 3
b = 5
print(a

5. is greater than or equal to Operator (>=)

The greater than or equal to operator is used to determine whether a value is greater than or equal to another value.

Sample code:

a = 5
b = 3
print(a >= b) # Output result: True

6. is less than The equal operator (

The less than or equal operator is used to determine whether a value is less than or equal to another value.

Sample code:

a = 3
b = 5
print(a

3. Logical operations

Logical operators are used to connect multiple conditions, and the result returns a Boolean value.

1. And operator (and)

And operator returns a Boolean value when two conditions are met at the same time.

Sample code:

a = 5
b = 3
c = 7
print(a > b and b

2. Or operator (or)

The or operator returns a Boolean value when at least one of two conditions is met.

Sample code:

a = 5
b = 3
c = 7
print(a > b or b > c) # Output result: True

3. Non-operator (not)

The non-operator returns the negation of a condition.

Sample code:

a = 5
b = 3
print(not a > b) # Output result: False

4. Assignment operation The

assignment operator is used to assign a value to a variable.

1. Simple assignment operator (=)

The simple assignment operator assigns the value on the right to the variable on the left.

Sample code:

a = 5
print(a) # Output result: 5

2. Additional assignment operator (=)

The addition assignment operator adds the value on the right to the variable on the left and assigns the result to the variable on the left.

Sample code:

a = 5
a = 3
print(a) # Output result: 8

3. Subtractive assignment operator (-=)

The subtractive assignment operator subtracts the variable on the left from the value on the right and assigns the result to the variable on the left.

Sample code:

a = 5
a -= 3
print(a) # Output result: 2

More operators and usage scenarios Please refer to the official Python documentation (https://docs.python.org/3/library/operator.html).

Conclusion:

This article mainly introduces common operators in Python and their usage scenarios, and demonstrates them through specific code examples. Skillful use of these operators can greatly improve programming efficiency, reduce the amount of code, and make the code more readable and understandable. I hope this article can be helpful to readers and further improve their Python programming skills.

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