SimpleMove without rotation

How do you use simple move without rotating the character. I want to move a character to a specific vector3 without rotating him. All the examples I have seen rotate the character then move him forward to the target. Thanks for your help.

Calculate a Vector3 as a direction (target.position - transform.position), then normalize it , then use this in your modification of the transform :

var moveDir : Vector3 = (target.position - transform.position).normalized;
transform.position += moveDir * speed * Time.deltaTime;