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)

I\

Answer 1

Pseudo code (i'm no C coder):

count = 0;
foreach(i in range){
    if(i % 2 == 0){
      count++;
    }
}