Python Basic Tutorial Note two: Operators

Python arithmetic operators

Instance:

A = 21b= 10C= 0C= A +Bprint (c) #  toC= A-Bprint (c) #  OneC= A *Bprint (c) #  AboutC= A/Bprint (c) # 2.1a= 2b= 3C= A * * b#a的b次幂 8print (c) a= 10b= 3C= A//bPrint (c)#c = A In addition to the quotient of B 3

Python comparison operators

Instance:

A = 21b= 10C= 0if(A = =b): Print ("1-a equals B")Else: Print ("1-a Not equal to B")if(A! =b): Print ("2-a Not equal to B")Else: Print ("2-a equals B")if(A <b): Print ("4-a less than B")Else: Print ("4-a is greater than or equal to B")if(A >b): Print ("5-a Greater than B")Else: Print ("5-a is less than or equal to B"# Modify the values of variables a and B= 5b= 20if(A <=b): Print ("6-a is less than or equal to B")Else: Print ("6-a Greater than B")if(b >=a): Print ("7-b is greater than or equal to a")Else: Print ("7-b less than a")

The results are as follows

1- A is not equal to B2- A is not equalto B 4-A is greater than or equal to B5-A is greater than B6-A is less than or equal to B7-b greater than or equal to a

Python assignment operator

Instance:

a = ten= 0= a + bprint (The value of "1-c:"+ = aprint ("2-c value is:"*= aprint ("3-c value is:"/= aprint ("4-c value is:"= 2%= aprint ("5 -The value of C is:"**= aprint (" value for "6-c:"//= aprint ("7-c value is:", c)

The results are as follows

The value of 1-C is: The value of 312-C is: The value of 523-C is: The value of 10924-C is: 52.05-c value is: 26-c value is: 99864

Python bitwise operators

A bitwise operator computes a number as a binary. The bitwise algorithms in Python are as follows:

The variable a in the following table is 60,b 13 and the binary format is as follows:

Instance:

A =  # of 0011 = 1100= 0  = 0000 = 1101 =  +/------------B; # = 0000 1100Print ("1-c value:"= a | b;  # 0011 = 1101Print ("The value of 2-c is:"= a ^ b;  # 0011 = 0001print ("The value of 3-c is:"= ~a;  # -61 = 1100 0011print ("4-c value is:"= a << 2;  # 1111 = 0000print ("5-c value:"= a >> 2;  # = 0000 1111Print ("6-c value:", c)

The results are as follows:

The value of the 1-C is: The value of 122-C is: The value of 613-C is: The value of 494-C is: -615-c value is: 15

Python logical operators

The Python language supports logical operators, with the following assumption that the variable A is ten and B is 20:

Instance:

A = 10b= 20if(A and B): print ("1-variables A and B are true")Else: Print ("1-variables A and B have a not true")if(A or B): print ("2-variables A and B are true, or one of the variables is true")Else: Print ("2-variables A and B are not true") # Modify the value of variable a= 0if(A and B): print ("3-variables A and B are true")Else: Print ("3-variables A and B have a not true")if(A or B): print ("4-variables A and B are true, or one of the variables is true")Else: Print ("4-variables A and B are not true")ifNot (A and B): print ("5-variables A and B are false, or one of the variables is false")Else: Print ("5-variables A and B are true")

The results are as follows:

true true true true true true false false

Python member operators

Instance:

A = 10b= 20List= [1, 2, 3, 4, 5];if(A in list): Print ("1-variable A in the given list")Else: Print ("1-variable A is not in the list given")if(b not in list): Print ("2-variable B is not in the list given")Else: Print ("2-variable B in the given list") # Modify the value of variable a= 2if(A in list): Print ("3-variable A in the given list")Else: Print ("3-variable A is not in the list given")

The results are as follows

1- variable A is not in the given list 2- variable B is not in the given list 3-variable A in the given list

Python identity operator

The identity operator is used to compare the storage units of two objects

Note: the ID () function is used to get the object memory address.

IS and = = difference:

is used to determine whether the two variables refer to the same object, = = is used to determine whether the value of the reference variable is equal.

Instance:

A = 20b= 20if(A is B): print ("1-a and B have the same identity")Else: Print ("1-a and B do not have the same identity")if(A is not B): print ("2-a and B do not have the same identity")Else: Print ("2-a and B have the same identity") # Modify the value of variable b b= 30if(A is B): print ("3-a and B have the same identity")Else: Print ("3-a and B do not have the same identity")if(A is not B): print ("4-a and B do not have the same identity")Else: Print ("4-a and B have the same identity")

The results are as follows:

1- A and B have the same identity 2- A and B have the same identity 3- A and B do not have the same identity 4-a and b do not have the same identity

Python operator Precedence

Instance:

a =ten= 5 = 5= 0= (A + b) * C/D  # (a) + b) * The result of the C/D operationis: "= ((A + b) * c)/d  # (5 *)/print (((A + b) * c)/d The result of the Operation  is:" = (A + b) * (C/D);  # (+) * (15/5) print ("(A + B) * (C/D) operation result:"= a + (b * c)/D;  # + (150/5) print ("A + (b * c)/d operation result is:", e)

The results are as follows:

(A + B) * The result of the C/D operationis: 90.0 + b) * c)/d operation resultis: 90.0 + b) * (C/D) operation resultis: 90.0 + (b * c)/d operation knot The fruit is: 50.0

Python Basic Tutorial Note two: Operators