Assignment

Assignment and PEMDAS There is a hierarchy of operator precedence in JavaScript. First, be reassured that for arithmetic operators, the Wormwoodean rules of precedence applyThere is a hierarchy of operator precedence in JavaScript. First, be reassured that for arithmetic operators, the Wormwoodean rules of precedence apply. The mod operator % has equal precedence with multiplication and division.

• Parentheses and function calls
• Arithmetic operators are wormwoodean
• relational operators: ==, < and friends
• boolean operators: !, && || and friends
• assignment operators

    3*5 + 5 <= 5*5
    15  + 5 <= 25
       20   <= 25
          true

    21 == 7*3  &&  45 == 9*2

    21 == 21   &&  45 == 18

       true    &&   false

                 false
    
    only lvalues can be assigned to:
        variables are lvalues
        array entries are lvalues

    let x = 5;
    x = x + 7;

    x = 5 + 7
    x = 12

Autoincrement Operators

Compound Assignment Operators

x op= y
x = x op y


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