Can someone explain this variables assignments pls

[green bluff]

Hi guys, I'm watching Gdquest's platformer tutorial and don't understand how "velocity" is being used twice here, can someone help me? how this isn't overriding? Also, when I pass as func params I'm using the "velocity" from the parent script?

[lapis flax]

it is being overwritten however if you think about this operation

var x

x = 1
x = x + 1

print(x) => 2```
because velocity is an argument in the `move_and_slide` function it is not lost, it is modified and the result of move_and_slide is returned and assigned to the velocity variable, like above the result of adding 1 to x was assigned to x.

[green bluff]

so at the first moment velocity is just Vector2.ZERO from the parent's script, then on the line 7 I modified it to the returned expression of calculate_move_velocity and this result is passed as an argument of move_and_slide on the next line?

[lapis flax]

That sounds correct. And on line 8 you assign it again as the return value of move and slide.

[green bluff]

Oh, nice