Nugroho's blog.: Prime Number on Delphi

Friday, April 7, 2017

Prime Number on Delphi

Using Delphi to generate prime number? Okay, there's some code out there with

if (i mod 2 <>0) and (i mod 3 <>0) and (i mod 5 <>0) and (i mod 7 <>0) then i is prime.

Don't use that.

That's just for prime number below 100.

Use this instead.

var i,j:integer;
prime:boolean;
begin
for i:=2 to 200 do begin
prime:=true;
for j:=2 to i-1 do begin
if i mod j=0 then prime:=false;
end;
if prime=true then memo1.Lines.Append(intToStr(i));
end;
end;
.

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