What is the associativity of operators with the same precedence in python

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    When dealing with operators in Python we have to know about the concept of Python operator precedence and associativity as these determine the priorities of the operator otherwise, we’ll see unexpected outputs.

    Operator Precedence: This is used in an expression with more than one operator with different precedence to determine which operation to perform first.

    Example: Solve 

    10 + 20 * 30
    

    What is the associativity of operators with the same precedence in python

    10 + 20 * 30 is calculated as 10 + (20 * 30)
    and not as (10 + 20) * 30
    

    Code:

    Python3

    expr = 10 + 20 * 30

    print(expr)

    Output:

    610
    

    Example: Now, let’s see an example on logicalor‘ & logical and‘  operator.  ‘if‘ block is executed even if the age is 0. Because precedence of logical ‘and‘ is greater than the logical ‘or‘.

    Python3

    name = "Alex"

    age = 0

    if name == "Alex" or name == "John" and age >= 2 :

        print("Hello! Welcome.")

    else :

        print("Good Bye!!")

    Output:

    Hello! Welcome.
    

    Hence, To run the ‘else‘ block we can use parenthesis( ) as their precedence is highest among all the operators.

    Python3

    name = "Alex"

    age = 0

    if ( name == "Alex" or name == "John" ) and age >= 2 :

      print("Hello! Welcome.")

    else :

      print("Good Bye!!")

    Output:

    Good Bye!!
    

    Operator Associativity: If an expression contains two or more operators with the same precedence then Operator Associativity is used to determine. It can either be Left to Right or from Right to Left.

    Example: ‘*’ and ‘/’ have the same precedence and their associativity is Left to Right, so the expression “100 / 10 * 10” is treated as “(100 / 10) * 10”.

    What is the associativity of operators with the same precedence in python

    Code:

    Python3

    print(100 / 10 * 10)

    print(5 - 2 + 3)

    print(5 - (2 + 3))

    print(2 ** 3 ** 2)

    Output:

    100
    6
    0
    512
    

    Operators Precedence and Associativity are two main characteristics of operators that determine the evaluation order of sub-expressions in absence of brackets.

    Example: Solve 

    100 + 200 / 10 - 3 * 10
    

    What is the associativity of operators with the same precedence in python

    100 + 200 / 10 - 3 * 10 is calculated as 100 + (200 / 10) - (3 * 10)
    and not as (100 + 200) / (10 - 3) * 10
    

    Code:

    Python3

    expression  = 100 + 200 / 10 - 3 * 10

    print(expression )

    Output:

    90.0
    

    Please see the following precedence and associativity table for reference. This table lists all operators from the highest precedence to the lowest precedence.

    OperatorDescription  Associativity
    ( ) Parentheses   left-to-right
    ** Exponent  right-to-left
    *  /  % Multiplication/division/modulus left-to-right
    +  – Addition/subtraction left-to-right
    <<  >> Bitwise shift left, Bitwise shift right left-to-right
    <  <= 
    >  >=
    Relational less than/less than or equal to 
    Relational greater than/greater  than or equal to
    left-to-right
    ==  != Relational is equal to/is not equal to left-to-right

    is,  is not

    in, not in

    Identity

    Membership operators

    left-to-right
    & Bitwise AND left-to-right
    ^ Bitwise exclusive OR left-to-right
    | Bitwise inclusive OR left-to-right
    not Logical NOT right-to-left
    and Logical AND left-to-right
    or Logical OR left-to-right

    +=  -= 
    *=  /= 
    %=  &= 
    ^=  |= 
    <<=  >>=
    Assignment 
    Addition/subtraction assignment 
    Multiplication/division assignment 
    Modulus/bitwise AND assignment 
    Bitwise exclusive/inclusive OR assignment 
    Bitwise shift left/right assignment
    right-to-left

    What is the associativity of operators with same precedence?

    Associativity is the left-to-right or right-to-left order for grouping operands to operators that have the same precedence. An operator's precedence is meaningful only if other operators with higher or lower precedence are present. Expressions with higher-precedence operators are evaluated first.

    What is the associativity of operators with the same precedence in Python Mcq?

    Associativity is the order in which an expression with multiple operators of the same precedence is evaluated. Associativity can be either from left to right or right to left. Almost all the operators have left-to-right associativity, except a few.

    Which has same precedence in Python?

    Python follows the same precedence rules for its mathematical operators that mathematics does. Parentheses have the highest precedence and can be used to force an expression to evaluate in the order you want. Since expressions in parentheses are evaluated first, 2 * (3-1) is 4, and (1+1)**(5-2) is 8.

    What is the operator precedence according to Python?

    The order of precedence of the membership operators in Python from left to right is in , not in .