How to use operators in python

The

operator is a commonly used half-width symbol used to perform programming, perform calculations of four arithmetic operations, and compare sizes. There are different types of operators in Python. Let’s take a closer look at how to use operators in Python.

Let’s first take a look at several operators in Python

Algebraic operators

Algebraic operations Symbols refer to the operations used in calculations represented by the four arithmetic operations.

It is similar in name to the assignment operator, but it is an algebraic operator.

+, -, *, /, %, **, //

Bit operators

Bit operators are operators that perform bitwise operations on integers

~, &, |, ^, <<, >>

Assignment operators

Assignment operators are operators used to assign values ​​to variables, arrays, etc.

It is similar in name to the algebraic operator, but it is an assignment operator.

=, +=, -=, *=, /=, %=, **=, //=, &=, |=, ^=, <<=, >>=

Comparison operators

Comparison operators are operators used to compare lvalues ​​and rvalues.

==, !=, <, >, <=, >=, <=>, ===

Logical operators

Logical operators (also known as Boolean operators) are usually used in conditional expressions of if statements. In conditional expressions Mainly returns true or false.

and, or, not

String operations

String operators manipulate strings. The number of characters when added starts from 0 characters. To start operating from the end of a character, specify a negative value.

+, *, [n:m]

Let’s take a look at How to use Python operators

Let’s take a look at specific examples

Assignment operator example

a = 10.0
b = 3
print(a+b)
print(a-b)
print(a*b)
print(a/b)
print(a%b)
print(a**b)
print(a//b)

The running results are as follows:

13.0
7.0
30.0
3.33333333333
1.0
1000.0
3.0

Analysis:

In the first and second lines , assign the floating point number 10.0 to variable a, and assign the integer 3 to variable b.

Use print statements to display calculation results.

Examples of comparison operators

if 0 == 1:
  print("相同")
else:
  print("不相同)

Running results:

不相同

Analysis:

The if statement is used to determine the numbers 0 and 1 is the same or different.

We use comparison operator == for comparison.

Since 0 and 1 are different numbers, the display result is "not the same"

Example of string operation

a = "php中文网"
b = "在线课程"
print (a + b)

The displayed result is:

php中文网在线课程

Analysis:

The string "php Chinese website" is assigned to variable a.

For variable b, assign the value to "online course".

In the print statement on the third line, use string operators to combine variables a and b.

The result shows that the content that combines variable a and variable b is the string "php Chinese online course".

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