Why does this not instantiate objects?

Questions & Answers
1

public class TankSpawner : MonoBehaviour {
int counter = 0;
public GameObject tankPrefab;

void update () {
    counter+=1;
    if (counter == 100) {
        Instantiate(tankPrefab, new Vector3(Random.Range(-5,5), Random.Range(-5, 5), Random.Range(-5, 5)), Quaternion.identity);
        counter = 0;
    }
}

}

And yet nothing happens(and yes I have set the GameObject to be the Tank)

2

update() must be Update() (Capital “U”).