C# UL and >> operators

Question

What does this meaning mean in words?

(SomeVariable * 330UL >> 10)

Is it: SomeVariable times 3.3 shift right 10 bit??

Answer 1

No.

It means SomeVariable times 330, promote to long and shift non-cyclically right 10bits.

(it would be cyclic, or arithmetic shift without the promotion).

Answer 2

Right-shifting an integral value by one is equivalent to dividing it by 2. Two shifts equivalent to dividing by 4. Etcetera. Which makes the expression equivalent to:

ulong value = ((ulong)SomeVariable * 330) / 1024;

Answer 3

UL stands for Unsigned Long. >> yes it is bitwise arithmetic shift.

Answer 4

可变时间330作为无符号长移位右移10位