Salesforce Developer Support

 Account acc = new  Account(); acc.Name = 'Test Account'; Insert acc; syntax- objectApiName obj = objectApiName(); obj.fieldapiName = yourValue; Insert obj; Example-  objectApiName= Account,Contact,Broker__c obj= acc for account , con for contact (anything you write here ) fieldapiName= required field name and all field which value you want to insert( Set mandatory fields if required .) Example = Contact con=new Contact(); con.lastName='Test contact'; insert con; if any validation  are activated then you put value according to your  validation  else it will give you error .

public class singleEmailSend {     // Public method     public static void SingleMail(String address, String subject, String body) {         // Create an email message object         Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();         String[] sendingTo = new String[]{address};          mail.setToAddresses(sendingTo);         mail.setSubject(subject);         mail.setPlainTextBody(body);         //message sending       Messaging.sendEmail(new Messaging.SingleEmailMessage[] {mail});      } }