consistent speed while jumping (jump and run game)

Hi I work on a simple jump and run game but I have the problem that when I jump the player stops.
I don't know why because I add in jump() the x movement.

Code (CSharp):

1. void run(){
2.         rb2d.AddForce (new Vector2 (moveForce, 0f));
3.     }
4.  
5.     void jump(){
6.         rb2d.AddForce (new Vector2 (moveForce, jumpForce));
7.         jumping = true;
8.     }

 

I solved the problem by using RigidBody2d.velocity instead RigidBody2D.AddForce

Code (CSharp):

1.     void run(){
2.         jumping = false;
3.         rb2d.velocity = new Vector2(moveSpeed, rb2d.velocity.y);
4.     }
5.  
6.     void jump(){
7.         jumping = true;
8.         rb2d.velocity = new Vector2(rb2d.velocity.x, 0);
9.         rb2d.velocity = new Vector2(rb2d.velocity.x, jumpSpeed);
10.     }