Middle Valley Education python operators and expressions

The Python operator includes

• Assignment operator (=)
• Arithmetic operators (+ 、-、 *,/,//,%, power (two asterisks))
• Relational operators (<, >, <=, >=,! =, = = (exactly equals))
• logical operators (and, or, not)
  

An expression
is a formula that connects different data (including variables, functions) with the operator by a certain rule.

Attention

• "/" division. If the action is evenly divisible on the integer type, it is normal division if it is acting on a floating-point type.
• "//" integer Division (floor division). As follows:

>>> 5.6/22.8>>> 5.6//22.0>>> 5.6//2.82.0

• "* *": Operation of Power

>>> 3**29>>> 2**38

• "+ =", "-=", "*=", "/=" 、、、

>>> 1<2True>>> 2<1False>>> 1!=2True>>> 1==1True>>> 1==1.0True

Precedence of Operators

From top to bottom is from low to high

Simple arithmetic device

 1   #!/usr/bin/python  2  3  a = int  (raw_input (" Please input NUM1: "))  4   #raw_input () return str type!  5  b = int  (raw_input ()) 6  7  print  A + b 8  print  A-9  print  A * b 10  print  A/b  

运行结果：~ python computer.pyplease input num1:12num2:21410246

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Middle Valley Education python operators and expressions