C# coroutine not working

Unity Engine
1

hey all, sorry about this but im still very new to C# and i find coroutines quite confusing. basically i made section of script to control the fire rate of a gun and i get a ton of errors when trying to use it. i posted this in the answers section but haven’t gotten any replies so i thought id ask here.

i originally had the code:

    using UnityEngine;
    using System.Collections;
     
    public class Wep_gun01 : MonoBehaviour {
     
    public GameObject BulletPrefab;
    public GameObject BulletSpawn;
    float bulletimpulse = 10f;
    float ammo = 35f;
    private bool canfire = true;
    public float firerate = 0.2f;
     
    // Use this for initialization
    void Start () {
     
    StartCoroutine(firerate());
     
    }
     
    // Update is called once per frame
    void Update () {
     
    if(canfire == false) {
    IEnumerator firerate() {
    yield return WaitForSeconds(firerate);
    canfire = true;
    }
    }
     
    if(Input.GetButton("Fire1")  ammo >= 0) {
    if(canfire == true) {
    GameObject thelaser = (GameObject) Instantiate(BulletPrefab, BulletSpawn.transform.position + BulletSpawn.transform.forward, BulletSpawn.transform.rotation);
    thelaser.rigidbody.AddForce( -BulletSpawn.transform.forward * bulletimpulse, ForceMode.Impulse);
    ammo = ammo - 1f;
    canfire = false;
    }
    }
     
    if(Input.GetButtonDown("Reload")  ammo < 35) {
    ammo =35f;
    }
     
    }

but that came up with a ton of errors, now im using this:

    using UnityEngine;
    using System.Collections;
     
    public class Wep_gun01 : MonoBehaviour {
     
		public GameObject BulletPrefab;
		public GameObject BulletSpawn;
		float bulletimpulse = 10f;
		float ammo = 35f;
		private bool canfire = true;
		public float firerateset = 0.2f;
     
    // Use this for initialization
    void Start () {
     
    	StartCoroutine(firerate());
     
    }
    
		IEnumerator firerate() {
			yield return new WaitForSeconds(firerateset);
			canfire = true;
		}
	
    // Update is called once per frame
    void Update () {
     
    	if(Input.GetButton("Fire1")  ammo >= 0) {
    		if(canfire == true) {
    			GameObject thelaser = (GameObject) Instantiate(BulletPrefab, BulletSpawn.transform.position + BulletSpawn.transform.forward, BulletSpawn.transform.rotation);
    			thelaser.rigidbody.AddForce( -BulletSpawn.transform.forward * bulletimpulse, ForceMode.Impulse);
    			ammo = ammo - 1f;
    			canfire = false;
    		}
    	}
     
    	if(Input.GetButtonDown("Reload")  ammo < 35) {
    		ammo =35f;
    	}
		
    }
}

but i dont know how to ‘call’ the ienumerator to activate when canfire = false.

any help would be much appreciated.

2

StartCoroutine(firerate());