How to round up a double number?

Question

C++ / C#

There is the following code:

return Math.Round((size / 1000) * (width / 1000), 3);

If we substitute 1355 in size, and 700 in width
Then it turns out 0.948 (if with 4 digits, then 0.9485), I need to round such numbers up, i.e. to get 0.949.

Answer 1

Math.Ceiling
Math.Floor is
an elementary task.
Think of it as an aptitude test.
PS I will take it into service in order to weed out juniors at the initial stage at interviews