Movements 2D not on input

Hey guys, I'm new on this forum and on Unity also.
I've seen few topics dealing with these information but I have a problem that could not be considered part of coding.

I'm studying C at school, so C# is still new to me.

I know that movement is just an illusion made by a continuous replacement of the image in the next or previous space.
What I'm asking for is how can I translate this to code?
Mmmh. I take the initial position of my Game Object, and multiply it for a variable of my choice...all this in the "Update" function, right?
And also multiply them for Time.deltaTime?

Example:

Code (csharp):

1. void function Update
2. {
3. transform.position = transform.position * speed /*my variable initialised before*\ * Time.deltaTime /* To have it moving every second and not every frame*\;
4. }

Is it all?

I'm a newbie.. sorry if I sound stupid or don't know what..

Thanks in advance,
Bye

 

Code (csharp):

1.  
2. float speed;
3. Vector3 direction;
4.  
5. void Start() {
6.   // Picking random values.
7.   speed = 10;
8.   direction = Vector3.right;
9. }
10.  
11. void Update() {
12.   // Take current position, and add another Vector3 to it.
13.   // The value we add is how far the object moves in a frame.
14.   transform.position += speed * direction * Time.deltaTime;
15. }
16.  

EDIT: For 2D, you can use Vector2 instead of Vector3.

 

Thank you so much! So I have to add to transform.position not to multiply it. Thank you again
Sorry for your waste of time..
Bye