What are arithmetic operators, assignment operators and compound operators in Python?

青灯夜游
Release: 2018-10-20 15:38:42
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This article brings you an introduction to what arithmetic operators, assignment operators and compound operators are in Python. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Arithmetic operators

Common arithmetic operators are:

The addition operator

print(1 + 2);   // 3
print('1' + '2'); //12
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can not only add two numbers, but also connect two strings

- Subtraction operator

print(4 - 2)    // 2
print(4 - 12)    // -8
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* Multiplication operator

print(5 * 6);     //30
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/ Division operator (the denominator cannot be zero)

print(5 / 2);      //2.5
print(5 / 0)    //错误
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As you can see from the second code, the denominator cannot be 0 

** Power operation Symbol

print(2 ** 3);   //8 
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// Integer division operator

print(5.5 // 2);  //2.0  
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% Modulo operator ( Remainder operator)

print(5 % 2);    //1
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Compound operator

Common compound operators are:

Additional assignment operator=

a = 5;
a +=2   // a = a + 2
print(a);   // 7
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Subtractive assignment operator-=

a = 5;
a -=2  //a = a - 2
print(a); // 3
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Multiplication assignment operator*=

a = 5;
a *=2
print(a);   // 10
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Division assignment operator/=

a = 5;
a /=2
print(a);    // 2.5
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Remainder assignment operator%=

a = 5;
a %=2
print(a);    // 1
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Power assignment operator **=

a = 5;
a **=2
print(a);  // 25
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Round assignment operator//=

a = 5;
a //=2
print(a);   // 2
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Assignment operator

You can use chained assignment

a = b = c = 10;
print(a,b,c);     // 10  10  10
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Note: You must consider the issue of priority. The following examples must take into account the parentheses. Use

num = (5 - 4) + 1 * 7 / 2;
print(num);     // 4.5
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source:cnblogs.com
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