Live Demo: JavaScript Convert a Float Number to a Whole Number

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JavaScript Convert a Float Number to a Whole Number</title>
</head>
<body>
 <script>
 document.write(Math.trunc(3.5) + " "); // Prints: 3
 document.write(Math.trunc(-5.7) + " "); // Prints: -5
 document.write(Math.trunc(0.123) + " "); // Prints: 0
 document.write(Math.trunc(-1.123) + " "); // Prints: -1
 
 document.write(Math.ceil(3.5) + " "); // Prints: 4
 document.write(Math.ceil(-5.7) + " "); // Prints: -5
 document.write(Math.ceil(9.99) + " "); // Prints: 10
 document.write(Math.ceil(-9.99) + " "); // Prints: -9
 
 document.write(Math.floor(3.5) + " "); // Prints: 3
 document.write(Math.floor(-5.7) + " "); // Prints: -6
 document.write(Math.floor(9.99) + " "); // Prints: 9
 document.write(Math.floor(-9.99) + " "); // Prints: -10
 
 document.write(Math.round(3.5) + " "); // Prints: 4
 document.write(Math.round(-5.7) + " "); // Prints: -6
 document.write(Math.round(7.25) + " "); // Prints: 7
 document.write(Math.round(4.49) + " "); // Prints: 4
 </script>
</body>
</html>