I know this is a basic error but i can't find out how to make my float into text here if my code,

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
public class AntiCheat : MonoBehaviour {
private float Health = 100;
private float ammo = 30;
private float reloadamount = 30;
private float backupammo = 420;
private float ammoloseamount = 1;
public Text Healthtxt;
public Text Ammotxt;
public Text leftoverammotxt;
public string Ammo;
public switctweapons _switctweapons;
private void Healthanticheat(){
if (Health > 100) {
Health = 100;
}
}
void start(){
Ammotxt = “Ammo:” + Ammo.ToString();
leftoverammotxt = “backupammo:” + backupammo.ToString;
}
void Update () {
Ammotxt;
if (Input.GetButtonDown (“Fire1”)) {
ammo - ammoloseamount;
}
if (ammo == 0) {
backupammo - reloadamount;
ammo.Equals(30);
}
if (reloadamount == 0) {

	}
}

}

I failed