Numeric form spec
{G|GZ|N|NZ}
The "numeric form spec" or "num form-spec" parameter should be replaced with a numeric format specification from the following group:
G - Generic
GZ - Generic Zero Suppress
N - Numeric Display
NZ - Numeric Display Zero
The specifications, which are applicable for a given statement, are identified in the parameters text for that statement. See Format Specifications for information about others.