i was wondering how not make my player fly off

so i was wondering how i could make it so that my player cant just fly off into the sunset so say like maybe a timer after every jump but i dont know how to do that

Character jumping actions typically involve checking for when they are touching the ground, using something like a trigger collider or a raycast pointed downward from their feet.

With what little information you’ve provided though, there’s not much more that can be said.

oh i didnt think of that thanks

but can

give me an example in code please

public class Example : MonoBehaviour {
   public LayerMask groundLayer;

   private void Update() {
      if(Input.GetKeyDown(KeyCode.Space) && IsTouchingGround) {
         Jump();
      } 
   }

   private void Jump() {
      //Code to make the player jump.
   }

   private bool IsTouchingGround => Physics.Raycast(transform.position, transform.position + Vector3.down, 1f, groundLayer);
}

See:
https://docs.unity3d.com/ScriptReference/Physics.Raycast.html
https://docs.unity3d.com/Manual/Layers.html

Note that Physics.Raycast is for 3D scenes. If you’re making a 2D game, use Physics2D.Raycast instead.
Unlike, Physics.Raycast, which returns a bool, Physics2D.Raycast returns a RaycastHit2D, so checking if the player is on the ground would be slightly different:

private bool IsTouchingGround => Physics2D.Raycast(transform.position, transform.position + Vector3.down, 1f, groundLayer).collider != null;