Unexpected symbols

Could someone tell me what's wrong with my code? Unity's telling me I have a bunch of "unexpected symbols," including: if, (, ), =, and ;

Sorry, really new to this.

 {

 //Movement
 public float speed;
 public float jump;
 float moveVelocity;
 
 //Grounded Variables
 bool grounded = true;

 void Update ()
 {
     
     //Jumping
     if(Input.GetKeyDown (KeyCode.Space) || Input.GetKeyDown (KeyCode.UpArrow) || Input.GetKeyDown (KeyCode.Z) || Input.GetKeyDown (KeyCode.W))
     {
         if(grounded)
         {
             GetComponent<Rigidbody2D> ().velocity = new Vector2 (GetComponent<Rigidbody2D> ().velocity.x, jump);
         }
     }
     
     //Left Right Movement
     if (Input.GetKey(KeyCode.LeftArrow) || if(Input.GetKey(KeyCode.A))
     {
         moveVelocity = -speed;
     }
     if (Input.GetKey(KeyCode.RightArrow) || if(Input.GetKey(KeyCode.D))
     {
         moveVelocity = speed;
     }
     
     GetComponent<Rigidbody2D> ().velocity = new Vector2 (moveVelocity, GetComponent<Rigidbody2D> ().velocity.y);
 }

}