PHP

$number = 105
return number_format((float)$number, 2, '.', '');
Example:

$foo = "105";
echo number_format((float)$foo, 2, '.', '');  // Outputs -> 105.00

JAVASCRIPT

DecimalFormat df = new DecimalFormat("#.00");
double angle = 20.3034;

DecimalFormat df = new DecimalFormat("#.00");
String angleFormated = df.format(angle);
System.out.println(angleFormated); //output 20.30

TWIG

{{ 200.35|number_format }}
{{ 9800.333|number_format(2, '.', ',') }}