"Your first 3D game" has several mistakes

[mazingtech]

Your Godot version:4.0.stable.mono

Issue description:

1. Properties of Vector2/Vector3 are suppose to be in uppercase;
   2.Parameter "delta" are suppose to be a double, instead of float
   3._velocity = MoveAndSlide(_velocity, Vector3.Up); is not right either.

URL to the documentation page (if already existing):
https://docs.godotengine.org/en/stable/getting_started/first_3d_game/03.player_movement_code.html

[wzwywx]

My math is rusty but is PI/4 90 degrees or is it 45 degrees?

The comments for the code in the second script in this section (https://docs.godotengine.org/en/stable/getting_started/first_3d_game/04.mob_scene.html#removing-monsters-off-screen) says that the rotation range is between -90 to 90 degrees.

# This function will be called from the Main scene.
func initialize(start_position, player_position):
    ...
    # In this rotation^, the mob will move directly towards the player
    # so we rotate it randomly within range of -90 and +90 degrees.
    rotate_y(randf_range(-PI / 4, PI / 4))

[3lijah]

Also the C# snippets don't compile. I have working here: https://www.reddit.com/r/godot/comments/11ib90a/comment/jb1tko6/