How does For loop works

Code:

For "test" from 1 to 0 invokes two actions.

For "test" from 1 to -1 invokes three actions. etc.

Is this a bug or it should work like this ? I rather expect that "for loop" like this doesn't invoke any action.

loops can go to negative values,

Zero is the absence of a number, like darkness is the absence of light. We give the word "darkness" to describe the absence, and in the same way we (and computers) must have a way of demonstrating the absence of a number. Because of this, zero is counted with or without going into negatives.

Nope.

0 is both a number and the numerical digit used to represent that number in numerals. It fulfills a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures. As a digit, 0 is used as a placeholder in place value systems.

I don't know about Programming though.