<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/> <link rel="stylesheet" type="text/css" href="css/bootstrap.css"/> </head> <body> <nav class="navbar navbar-default"> <div class="container-fluid"> </div> </nav> <div class="col-md-6 well"> <hr style="border-top:1px dotted #ccc;"/> <div class="col-md-3"> <form> <div class="form-group"> <input type="number" id="num" class="form-control"/> </div> </form> </div> <div class="col-md-9"> <div class="col-md-6"> </div> <div class="col-md-6"> </div> </div> </div> </body> </html>
function generateNumbers(){ var number=document.getElementById('num').value; if(number == "" || number <= 0){ alert('Please enter something first'); }else{ var num=parseInt(number); var even=[]; var odd=[]; for(var i=1; i<=num; i++){ if (i % 2 == 0){ even.push(i); }else{ odd.push(i); } } document.getElementById('even').innerHTML=even.join(' ,'); document.getElementById('odd').innerHTML=odd.join(' ,'); } }