A feast of Python operators: Write code with elegance and efficiency

python, operator, mathematics, comparison, assignment

Mathematical operators

Python provides a series of mathematical operators for performing basic mathematical operations:

• Addition ( ): Add two numbers
• Subtraction (-): Subtract two numbers
• *Multiplication (): **Multiply two numbers
• Division (/): Divide two numbers (the result is a floating point number)
• Integer division (//): Divide two numbers (the result is an integer)
• Modulo (%):Find the remainder after dividing two numbers

a = 5
b = 2
print(a + b)# 输出：7
print(a - b)# 输出：3
print(a * b)# 输出：10
print(a / b)# 输出：2.5
print(a // b)# 输出：2
print(a % b)# 输出：1

Comparison operators

Comparison operators are used to compare the values ​​of two expressions:

• Equals (==): Checks whether two expressions are equal
• Not equal to (!=): Checks whether two expressions are not equal
• Greater than (>): Check whether the first expression is greater than the second expression
• Greater than or equal to (>=): Checks whether the first expression is greater than or equal to the second expression
• Less than (<): Check whether the first expression is less than the second expression
• Less than or equal to (<=): Checks whether the first expression is less than or equal to the second expression

a = 5
b = 2
print(a == b)# 输出：False
print(a != b)# 输出：True
print(a > b)# 输出：True
print(a >= b)# 输出：True
print(a < b)# 输出：False
print(a <= b)# 输出：False

Assignment operator

The assignment operator is used to assign a value to a variable:

• Assignment (=): Assign the value on the right to the variable on the left
• Additional assignment (=):Add the value on the right to the variable on the left
• Subtractive assignment (-=): Subtract the value on the right from the variable on the left
• *Multiplicative assignment (=): **Multiply the value on the right by the variable on the left
• Division assignment (/=): Divide the variable on the left by the value on the right
• Integer division assignment (//=): Divide the variable on the left by the value on the right (the result is an integer)
• Modulo assignment (%=): Take the variable on the left modulo and use the value on the right as the divisor

a = 5
a += 2# 等价于 a = a + 2
print(a)# 输出：7

Logical Operators

Logical operators are used to check the value of Boolean expressions:

• With (and): Check that all expressions are True only when they are True
• Or (or): Check that any expression is True if it is True
• Not (not): Reverse the value of the Boolean expression

a = True
b = False
print(a and b)# 输出：False
print(a or b)# 输出：True
print(not a)# 输出：False

Other operators

In addition to the above operators, Python also provides some other useful operators:

• Identity operator (is, is not): Check whether two objects point to the same object
• Member operator (in, not in): Check whether a value is contained in a sequence
• Range operator (range): Create a range object, used to generate a sequence of numbers

By flexibly using these operators, programmers can create Python code that is concise, efficient, and highly readable.

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