my animation script returns errors help

errors saying
The name "anim" does'nt exist in current context

heres my code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class animpizdiec : MonoBehaviour
{
// Start is called before the first frame update
void Start()
{
anim = GetComponent<Animator>();
}

// Update is called once per frame
void Update()
{
if (anim.GetCurrentAnimatorStateInfo(0).IsName("IDLE"))
{
if(Input.GetButtonDown("Fire 1"))
{
anim.SetTrigger("shoot trigger");
}
}
}
}

looked on youtube and everybody seem to be using the same script
help please