Python 运算符通常用于对值和变量执行操作。这些是用于逻辑和算术运算的标准符号。在本文中,我们将研究不同类型的 Python 运算符。

算术运算符

算术运算符用于执行数学运算,例如加法、减法、乘法和除法。

# Examples of Arithmetic Operator
a = 9
b = 4

# Addition of numbers
add = a + b

# Subtraction of numbers
sub = a - b

# Multiplication of number
mul = a * b

# Division(float) of number
div1 = a / b

# Division(floor) of number
div2 = a // b

# Modulo of both number
mod = a % b

# Power
p = a ** b

# print results
print(add)
print(sub)
print(mul)
print(div1)
print(div2)
print(mod)
print(p)

13
5
36
2.25
2
1
6561

位运算符

位运算符作用于位并执行逐位操作。这些用于对二进制数进行操作。

# Examples of Bitwise operators
a = 10
b = 4

# Print bitwise AND operation
"""
a = 00001010
b = 00000100
 ------------
    00000000 = 0

"""
print(a & b)

# Print bitwise OR operation
"""
a = 00001010
b = 00000100
 ------------
    00001110 = 14
"""
print(a | b)

# Print bitwise NOT operation
"""
a            =  00001010 =10
~a           =  11110101 = -11
or -10-1=-11
"""
print(~a)

# print bitwise XOR operation
"""
a=   00001010
b=   00000100
------------------
xor= 00001110 = 14

"""
print(a ^ b) 

# print bitwise right shift operation
print(a >> 2) #00001010 >>2 => 00000101 => 00000010 =2

# print bitwise left shift operation
print(a << 2) #00001010 <<2 => 00010100 => 00101000 =40

0
14
-11
14
2
40

运算符优先级

到目前为止,您会遇到许多运算符,例如加法、乘法等。但是当您在一个表达式中有多个运算符时,您会怎么做?

这是我们使用运算符的优先级来获得正确结果的情况。

Python中的运算符优先级表:

Python 中的 PEMDAS 规则: 我们会在优先考虑运算符的同时了解数学中的 BODMAS 规则。我们在 Python 中有一个类似的规则,那就是 PEMDAS。在哪里,

• P 表示括号

• E 表示指数

• M 表示乘法

• D 表示除法

• A 表示加法

• S 表示减法

a = 20
b = 10
c = 15
d = 5
e = 0

e = (a + b) * c / d       #( 30 * 15 ) / 5
print ("Value of (a + b) * c / d is ",  e)

e = ((a + b) * c) / d     # (30 * 15 ) / 5
print ("Value of ((a + b) * c) / d is ",  e)

e = (a + b) * (c / d);    # (30) * (15/5)
print ("Value of (a + b) * (c / d) is ",  e)

e = a + (b * c) / d;      #  20 + (150/5)
print ("Value of a + (b * c) / d is ",  e)

Value of (a + b) * c / d is  90.0
Value of ((a + b) * c) / d is  90.0
Value of (a + b) * (c / d) is  90.0
Value of a + (b * c) / d is  50.0