how to move position character with unity 3d for 2d code example

Example: how to move a 2d character in unity

if (moveInput != 0)
{
	velocity.x = Mathf.MoveTowards(velocity.x, speed * moveInput, walkAcceleration * Time.deltaTime);
}
else
{
	velocity.x = Mathf.MoveTowards(velocity.x, 0, groundDeceleration * Time.deltaTime);
}