Why does a float variable stop incrementing at 16777216 in C#?

Question

float a = 0;
while (true)
{
    a++;
    if (a > 16777216)
        break; // Will never break... a stops at 16777216
}

Can anyone explain this t

Answer 1

16777217 cannot be represented exactly with a float. The next highest number that a float can represent exactly is 16777218.

So, you try to increment the float value 16777216 to 16777217, which cannot be represented in a float.