Determines the format of the localized non-negative values.
pattern neg_format() const;
These keywords allow you to enter the format for both positive and negative values. There are 5 keywords to specify a format:
none
space
symbol
sign
value
A monetary format is a sequence of four of these keywords. Each value : symbol, sign, value, and either space or none appears exactly once. The value none, if present, is not first; the value space, if present, is neither first nor last. The behavior of breaking any of these rules is undefined. The default pattern for negative values, and for local and international formats is:
neg_format = symbol sign none value
Returns the patern initialized to a negative value.