PL/SQL command

PL/SQL
step-1 create a table

create table student(stdRollNo number, stdName varchar2(25), 

stdClass varchar2(25));
  
RUN THIS COMMAND, IF SUCCESSFULLY RUN THEN WRITE PL/SQL COMMAND

step-2 
 

declare
vid number:=1;
vname varchar2(25):='xyz';
vclass varchar2(25):='X';
begin
insert into student(stdRollNo, stdName , stdClass)
values(vid,vname,vclass);
end;