Languages Focus: Variables

A variable holds a value that you can use and change throughout your code so long as the variable is within scope. With variable declaration, you not only want to know the syntax of how you declare a variable but you also want to know where. Are you allowed to declare a variable inline? What are the available scopes: local vs. global. Can you assign a value at the same time you declare a variable?

var
  FName: String;   //This is old-style.
begin
  FName := "Mike Prestwood";
  MessageBox.Show(FName);
  
  Var Age: LongInt;  //Local variables.
  Age:=36;
  MessageBox.Show(Fname + " is " + Age + " years old");
  
  //Assign values too...
  Var Wife: String:="Lisa"; Var WifeAge: Integer:=32;
  messagebox.Show(wife + " is " + Wifeage + ".");
end;