How do i make a cube move (Continuosly without stopping) when i press a button once in unity 2D

Questions & Answers
1

how do i make a cube move without stopping when i press a button in unity (2D)

2

Declare a bool variable and initially assign it to false. When you press the button, change its value to true. Move character only if the bool is true.

private bool isAllowed = false;

private void AllowState()
    {
        if (isAllowed == true)
        {
            return;
        }
        if (Input.GetKeyDown(KeyCode.Space))
        {
            isAllowed = true;
        }
    }

    private void MoveObject()
    {
        if (isAllowed == true)
        {
            // Move code in here
        }
    }

private void Update()
{
    AllowState();
    MoveObject();
}
3

In the update loop, you can continuously update the position of the cube by a certain speed. So something like this

public int speed = 5;
Vector2 velocity;
private void Update()
{
   if(Input.GetKeyDown(KeyCode.Space))
       velocity.x = 1;

    transform.position += velocity * speed * Time.deltaTime;
}