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  1. <html>
  2. <head>
  3. <title>Bilangan Prima</title>
  4. </head>
  5. <body>
  6. <SCRIPT LANGUAGE = "JavaScript">
  7. <!--
  8. function cekPrima( n ) {
  9. var max = Math.sqrt(n);
  10. for( var i = 2; i <= max; i++ ) {
  11. if( n % i == 0 )
  12. return false;
  13. }
  14. return true;
  15. }
  16.  
  17. for( var n = 2; n < 20; n++ ) {
  18. if( cekPrima(n) ) {
  19. document.write( n + '<BR>' );
  20. }
  21. }
  22.  
  23. // -->
  24. </SCRIPT>
  25. </body>
  26. </html>