How to make a jump ? (638737)

i have a problem with my project because my jump is slow:

if (Input.GetKeyDown(KeyCode.Space)) {
GetComponent ().velocity = new Vector2 (GetComponent ().velocity.y,alturaSalto);
}

how to make a jump ???

What number are you giving alturaSalto? If it is a low number then you need to give a higher number.

You could use AddForce

            GetComponent<Rigidbody>().AddForce(new Vector2(0f, alturaSalto));

hi alturasalto is altitudeJump nad you line of code dont work

It does, you just need to set it a higher value. AddForce required a decent amount to make any noticeable change.