tap and hold function to keep flying in c#

Questions & Answers
1

I am using this code to make a fly.

 void Update () {
        // Fly
        if (Input.GetKeyDown(KeyCode.Space))
            GetComponent<Rigidbody2D>().AddForce(Vector2.up * force);
    }

But everytime i push and hold my space button the fly still fall like the simple press space button. Im just thinking if is it possible to have press and hold function to make it fly up? I dont have idea what should i start. Please share.

I forgot to tell, i dont use ground so actually the player keep falling, i added rigidbody to it and i want to add tap and hold function to make it fly, and keep fall if i release the tap.

Sorry for my english. I hope you understand what i mean

2

GetKeyDown only get’s the key in the current frame, from the documentation for GetKeyDown:

Returns true during the frame the user starts pressing down the key identified by name.

How with just GetKey it can be recognized as down per frame and from the documentation for GetKey:

Returns true while the user holds down the key identified by name. Think auto fire.

So use GetKey which should return true each frame it’s held down.