convert static method
Implementation
static String convert(String number, {String separator = ","}) {
String str = "";
for (var i = number.length; i > 0;) {
if (i > 3)
str = separator + number.substring(i - 3, i) + str;
else
str = number.substring(0, i) + str;
i = i - 3;
}
return str;
}