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while (Boolean_condition) { execute_code_block }
//Fetch 20 records from database List<apex_invoice_c> InvoiceList = [SELECT Id, APEX_Description_c, APEX_Status_c FROM APEX_Invoice_c LIMIT 20]; Integer i =1; //Update ONLY 10 records while (i< 10) { InvoiceList[i].APEX_Description__c = 'This is the '+i+'Invoice'; System.debug('Updated Description'+InvoiceList[i].APEX_Description_c); i++; }
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