Fourth session: Python operators

Like other programming languages, Python also has operators for executing program code operations, with 1 of commonly used operators. Python arithmetic operator 2. Python relational operator 3. Python assignment operator 4. Python logical operators, the following describes how each operator is used:

Arithmetic operators

In order to distinguish the differences between the operators more intuitively and clearly, we declare two variables a, B, and assign a=100 and b=12.

+	Two objects added	The value of A+b is: 112
-	Two number subtraction	The value of a-B is: 88
*	Two number multiplied or returns a string that is repeated several times	The value of A*b is: 1200
/	Divide two numbers	The value of A/b is: 8
%	Modulo-Returns the remainder of the division	The value of A%b is: 4
**	Power-Returns the power of B of a	The value of A**b is: 1000000000000000000000000
//	Divide-Returns the integer part of the quotient	The value of a//b is: 8

Program Run Results

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Note: In python2.x, integers can only be derived by integer except integers. If you want to get a fractional part, change one of the numbers to a floating-point number.

As 100/12.0=8.33333333333, because 12.0 is a floating-point number

Relational operators

The above variables and assignments are also used here, a=100,b=12

==	Equals, compares objects for equality	(A = = b) returns False
!=	does not equal, compares two objects that are not equal	(A! = b) returns true
<>	Not equal to, compare two objects are not equal, this operator is similar to! =	(a <> B) returns True.
>	Greater than, returns whether a is greater than B	(A > B) returns True
<	Less than, returns whether a is less than B	All comparison operators return 1 for true, and return 0 for false. This distinction is equivalent to the special variable true and false. Note that the uppercase of these variable names, (a < b) returns false
>=	Greater than or equal	Returns whether a is greater than or equal to B,true
<=	Less than or equal	Returns whether a is less than or equal to B,false

Program Run Results

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Assignment operators

The above variables and assignments are also used here, a=100,b=12

=	Simple assignment operator	c = A + B assigns the result of the operation of A + B to c
+=		c + = B is equivalent to C = C + B, and returns
-=	subtraction assignment operator	c-= B is equivalent to C = C-b, and returns
*=		c *= B is equivalent to C = c * B, and returns
/=		c/= B is equivalent to C = c/b and returns
%=	modulo assignment operator	c%= B is equivalent to C = c% B, and returns
**=		c **= B is equivalent to C = c * * b, and returns
//=	Take the divisible assignment operator	C//= B is equivalent to C = c//b and returns

Program Run Results

logical operators

The above variables and assignments are also used here, a=100,b=12

and	Boolean "and"-if x is False,x and y returns FALSE, otherwise it returns the computed value of y	12
Or	Boolean "or", if X is not 0, it returns the value of x, otherwise it returns the computed value of y	100
Not	Boolean "Non", if X is True, returns FALSE. If X is False, it returns True	Flase

Program Run Results

This article is from the "Dreamscape" blog, make sure to keep this source http://dyqd2011.blog.51cto.com/3201444/1974115

Fourth session: Python operators