Task

The objective is to write a function that finds the sum of all positive multiples of 3 or 5 below n.

Show output for n = 1000.

This is is the same as Project Euler problem 1.

Extra credit: do this efficiently for n = 1e20 or higher.




module main;
  integer i, suma;
 
  initial begin
  suma = 0;
    for(i = 1; i <= 999; i=i+1) 
    begin
        if(i % 3 == 0) suma = suma + i;
        else if(i % 5 == 0) suma = suma + i;
    end
    $display(suma);
    $finish ;
    end
endmodule