JavaScript Tutorial: Operator Precedence And Associativity

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[chapfellow]

1+2*1 is a bad example since it returns 3 no matter what order the operators are executed in. 1+2*3 would be better. And using only the + operator to demonstrate associativity is another bad example since + is a commutative operator in which the order never matters. Another commutative operator is * multiplication. Use instead - minus or / division. For example 3-2-1 is either (3-2)-1=0 or 3-(2-1)=2. But since minus is left-associative (most operators are) the answer to this is 0. Left or right associativity is used to determine the order for operators of equal precedence. Another example of a right-associative operator, besides = assignment, is the power operator which in many languages are written as ^ or **. This means that and not 64. You have good presentation skills but need to prepare better examples.

[atulcodex]

hey Hiii,
nice video I have seen this code on MDN but can't understand, please make a video on it


code : console.log(2 * 3 ** 4);
console.log(2 ** 3 ** 4);


How and why answer?

[sqyou]

all of the examples you showed at the beginning produce the exact same result regardless of the operator precedence level which doesn't really demonstrate the point.
(1 + 2) - 1 === 1 + (2 - 1)
(1 + 2) * 1 === 1 + (2 * 1)