format method
Implementation
String format() {
if (isZero()) {
return '' + sys.toChar(0);
}
final sb = StringBuilder('');
final var2 = mag;
final var3 = var2.length;
for (var var4 = 0; var4 < var3; ++var4) {
final digit = var2[var4];
sb.insert(0, sys.toChar(digit));
}
if (identical(sign, -1)) {
sb.insert(0, sys.getNegativeChar());
}
return sb.toString();
}