Move a part using unity3d key input code example

Example: how to move object in unity with keyboar

if (Input.GetKeyDown(KeyCode.LeftArrow))
{
    Vector3 position = this.transform.position;
    position.x--;
    this.transform.position = position;
}
if (Input.GetKeyDown(KeyCode.RightArrow))
{
    Vector3 position = this.transform.position;
    position.x++;
    this.transform.position = position;
}
if (Input.GetKeyDown(KeyCode.UpArrow))
{
    Vector3 position = this.transform.position;
    position.y++;
    this.transform.position = position;
}
if (Input.GetKeyDown(KeyCode.DownArrow))
{
    Vector3 position = this.transform.position;
    position.y--;
    this.transform.position = position;
}