Someone explain me why JavaScript calculating like this 😭

Question

Someone tell me why the answer of brain and calculator is different than JavaScript calculated answer for the given code!....
.
var a = 7
a = a-6
console.log(3*(a-5)+12)
.
JavaScript answer : 0 ;
.
But how n why ???

Answer 1

a = 7
a = 7-6 = 1
(3*(1-5)+12)
(3*(-4)+12)
((-12)+12) = 0

Answer 2

If you are unsure how the code works or what the calculation does, you can print out the steps with console.log().

Good night ;)

Answer 3

From your profile it looks like you completed the Javascript course... Did you try to run this code and print the intermediate steps?
7 – 6 = 1
3*(1–5) + 12= 3*(-4) + 12 = 0

Yaroslav Vernigora thanks, edited!

Answer 4

its okay, thats what the community is for. all of us are once wrong. even Lisa messed up a little with the answer. it can affect later time. its about half past one in the night on my watch. I think that Germany has something like that...

Answer 5

I would advise you to repeat the topic priority of performing operators

Answer 6

a = 7- 6 = 1
[3*(1-5) + 12]
You solve inner bracket first i.e ()
[3*(-4) + 12]
Then multiplication
[-12 + 12]
0

It is correct check on Bodmas rule

Bracket
Of
Division
Multiplication
Addition
Substraction

Answer 7

Lisa m actually weak in maths as it's not a part of my studies as well for years ago 💀... M good at javascript + jQuery + react (in progress). But not good in math questions 🌚🌚🌚🌚🌚🌚 feeling so dumb after getting the answer 🤣

Answer 8

Visualize your code execution

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https://pythontutor.com

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Answer 9

Mirielle no I were confused in brackets, I were adding all the values first which is equal to 8 than multiply, that's why.

Answer 10

a = 7
a = 7-6 = 1
For console. Log....
(3*(1-5)+12)
(3*(-4)+12)
((-12)+12) = 0