detect cycle in UnDirected

bool dfs(bool vis[],int i,vector<int>adj[],int parent)
{
    vis[i]=true;
    for(auto x:adj[i])
    {
        if(!vis[x])
        {
            if(dfs(vis,x,adj,i))return true;
        }
        else if(vis[x]&&x!=parent)return true;
    }
    return false;
}

bool isCyclic(vector<int> adj[], int V)
{
   bool vis[V]={false};
   for(int i=0;i<V;i++)
   {
       if(!vis[i]&&dfs(vis,i,adj,-1))return true;;
   }
   return false;
}