javascript - Math.round() round numbers up not 2 decimals after comma

Here is my code:

Math.round((7/2)).toFixed(2)

this code print: "4.00" while it should print 3.50. Where is a problem? How I can round this value whithout rounding-up?

Answer

No, it should print "4.00", and that's why it is: You've rounded the 3.5 to 4, then called toFixed(2) on 4.

If you want "3.50", then don't round it to a whole number first; toFixed will do rounding to the number of places you ask for (although rounding isn't required at all for 7/2 if you're outputting to two decimal places):

(7/2).toFixed(2)

E.g.:

snippet.log((7/2).toFixed(2));

Example where toFixed actually does rounding:

snippet.log((1.237).toFixed(2)); // "1.24"