class.sv

//-------------------------------------------------------
//class is user define datatype that include the propeties
//and method
//-------------------------------------------------------
class home; //define class  
  
  //declare class properties  
  bit light;  
  int fan;  
  string switch;

  //define class method(task/function)  
  task open_electricity();  
    switch = "ON";
    $display("\t switch is %0s so electricity is open",switch);  
  endtask:open_electricity  

endclass:home

module check_electricity;  

  initial begin:BEGIN_I  
    home h1;   //creating handle  
    h1=new();   //Creating Object for the Handle  
    h1.light=1;   // access the properties
    h1.fan=1;
    $display("");
    h1.open_electricity;  //access the method
    $display("\t light is %0d(ON) and fan is also %0d(ON)",h1.light,h1.fan);
    $display("");
  end:BEGIN_I

endmodule:check_electricity