For example, you can draw a number axis (that is, a long arrow to the right, which means it gets bigger as you go to the right) and set the midpoint to 0.

Then, for example, 1 is greater than 0, which is a positive number, and the point of 1 is on the right side of 0; 2 is greater than 1, so 2 is set to the right of 1.

Add a minus sign before 1, which is-1, and-1 is less than 0, so on the left side of 0, -2 is less than-1, and put it on the left side of-1, and then look at this number axis to understand.

0 is neither positive nor negative! ! ! 0 can calculate the dividing point between positive and negative numbers.