Find number of pending batch jobs in Salesforce

Code Format:

List<String> JobStatus = new List<String> {'Holding', 'Queued', 'Preparing', 'Processing'};

List<AsyncApexJob> pendingJobsStatus = [SELECT Id FROM AsyncApexJob WHERE Status IN: JobStatus];

pendingJobsStatus.size() ;// Note :  This will give you the  number of pending batch jobs
                                                         in Salesforce