Simplest way to calculate amount of even numbers in given range

Question

What is the simplest way to calculate the amount of even numbers in a range of unsigned integers?

An example: if range is [0...4] then the answer is 3 (0,2,4)

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Answer 1

Hint 1: The modulo operator will return the remainder of the current number
Hint 2: You don't need a for loop
Hint 3: A range is continuous
Hint 4: The number of even numbers in a continuous range are half even (sometimes half + 1, sometimes half - 1)
Hint 5: Building on Hint1: Consider also what (being + end + 1) % 2 gives
Hint 6: Most or all of the answers in this thread are wrong
Hint 7: Make sure you try your solution with negative number ranges
Hint 8: Make sure you try your solution with ranges spanning both negative and positive numbers