Hi Everyone
I have wrote code to create opportunity, if existing opp has 90% probability. So I have used parent-child query to queru opportunities related accounts.
I have used FOR - IN - FOR loops. The records are creating in huge number. Please provide proper code with single for loop and use handler class. I came to know that should not use tripple for loops. Then how to achieve without multiple loops.


public static void createOpp(List<Account> accList) {
        
       List<Opportunity> oppList = new List<Opportunity>();
        Map<Id, Account> acctMap = new Map<Id, Account>([Select Id, (Select Id, probability from Opportunities) from Account WHERE ID IN :accList]);
        
        for(Account a : accList) {
        
            for(Account ao: acList) {
            
                    for(Opportunity opp : ao.opportunities) {

                        if( opp.probability == 90){
                            Opportunity opptny = new Opportunity();
                            opptny.AccountId = a.Id;
                            opptny.Name      = a.Name + 'Opportunity with 90% prob new';
                            opptny.StageName = 'Prospecting';
                            opptny.probability = 90;
                            opptny.CloseDate = System.today().addMonths(3);
                            oppList.add(opptny);
                        }
                   }
               }
            }
        
        try{
        if(oppList.size() > 0){
            insert oppList;
            }
        } catch (DmlException e) {
            system.debug('Exception caused-->'+e.getMessage());
       } 
   }