Question

What's the difference between:
x≥0
And
Nonnegative integer.
?

Answer 1

• none, if x is an integer
• x may be a real number, hence not necessarily an integer

Explanation:

x ≥ 0 means x is non-negative, but it does not mean x is an integer. An additional restriction would need to be applied for x to be a non-negative integer.