Operator Precedence

Operator Precedence

Precedence represents the priority level of the operator. The operators with higher precedence will be executed first than of lower precedence.

Expression	Explanation
3/2*4+3+(10/4)**3-2
3/2*4+3+2.5**3-2	The expression in () is evaluated first. 10//4=2
3/2*4+3+15.625-2	Exponentiation ** is next
1.5*4+3+15.625-2 6.0+3+15.625-2	* and /have equal precedence, They are evaluated from left to right (Associativity). So, first / and then *
9.0+15.625-2 24.625-2 22.625	+ and – have equal precedence, They are evaluated from left to right (associability). So, first + and then

Operator Precedence

Operator	Name
()	Parenthesis
**	Exponentiation
-,~	Unary minus (ex: -a), Bitwise complement
*,/,//,%	Multiplication,Division, floor division(Performs division and gives only int quotient), Modulus
+,-	Addition and subtraction (Ex: a-b)
<<,>>	Bitwise left shift, Bitwise right shift
&	Bitwise AND
^	Bitwise XOR
|	Bitwise OR
>,>=,<,<=,==,|=	Relational (Comparision) Operator
=,%=,/=,//=,-=,+=	Assignment Operators
is, not in	Membership Operators
Not	Logical not
Or	Logical or
And	Logical and

 find out the evaluation of the following expression: d=(4-2)*3**2//2+3%8

d=2*3**2//2+3%8

d=2*3²//2+3%8

d=2*9//2+3%8  #Here * and // have same priority, associativity is left to right

d=18//2+3%8

d=9+3%8

d=9+3

Ans: 12

What is Associativity in Operators?

When two operators have the same precedence, associativity helps to determine which the order of operations.
Associativity is the order in which an expression is evaluated that has multiple operator of the same precedence. Almost all the operators have left-to-right associativity.

For example, multiplication and floor division have the same precedence. Hence, if both of them are present in an expression, left one is evaluates first.

Related Video: https://www.youtube.com/watch?v=q8jc3s7Nmhk&feature=youtu.be

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