Unexpected token: Identifier: velocity and Unexpected token: Identifier: move_and_slide

Question

extends KinematicBody2D

var score : int = 0

var speed : int = 200
var jumpForce : int = 600
var gravity : int = 800

var velocity : Vector2 = Vector2()

onready var sprite : Sprite = get_node("Sprite")

func physicsprocess(delta):

velocity.x = 0

if Input.is_action_pressed("move_left"):
    velocity.x -= speed
if Input.is_action_pressed("move_right"):
    velocity.x += speed

moveandslide(velocity, Vector2.UP) #When i add velocity it changes to Unexpected token: Identifier: velocity, if there is no velocity it becomes Unexpected token: Identifier: moveandslide