Hello,
could somebody explain such expression
var a = (1.5-1)*2 correct answer is 8
how does this expression calculate?
please.
It evaluates to 1
. You evaluate first those inside the parentheses. 1.5 - 1
equals 0.5
, then you multiply it by 2
, so you have 1
.
first this code evaluates the bracket in this case it is 1.5-1.0 = 0.5, then it is multiplied by 2 giving the answer 1 not 8.
yes and I think so tha correct answer is 1 but I have met such quize on faceebook
and all answers was that correct is 8!
do not trust the facebookâs quiz posts:smiley:
Thanks, now I know that such quiz is rubbish
Is it possible, that you have a typo in your example?
var a = (1,5 - 1) * 2
will give you 8
EDIT.
Found a nice explanation: http://www.i-programmer.info/programming/javascript/6524-the-confusing-comma-in-javascript.html
General info on operator precedence: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence
Yes
I have seen again the quiz
and question was var a = (1,5-1)*2;
not var a =(1.5-1)*2;
correct answer 8