N (read without locking) operation extender, 193
N (set Null) operation extender, 193, 242
named constants, 9, 22, 23, 25–27
edit words and, 93–94
naming conventions for, 12
named indicators, 16, 21
named parameter list, 326, 455–456
prototyped calls and, 463
naming conventions, 12, 429
natural expressions, 103–113, 200, 202
NE Boolean operator, 200, 213, 225, 253, 255, 282, 320, 382, 436
negative values, decimal data errors and 562–566
nesting
DO...END groups, 253
IF statement, 5, 423
IF-THEN-ELSE and, 439
opcode, 206–207
NEXT, 187, 312–313
MAXDEV, DEVID, and SAVEDS keywords for, 312–313
READ and, 312–313
syntax diagram for, 197
*NEXT, 31
*NOKEY constant, 236, 345
NOMAIN keyword, 42
program organization and, 397
procedures and subprocedures, 475, 484, 485
nonprogrammable terminals (NPT), 517
NOOPT Definition specification keyword, 64
*NOPASS, 482
NOT operator, 104
null capable fields, ALWNULL (Allow Null-Capable Fields) in, 555–556
*NULL figurative constant, 25
%NULLIND, 122, 158
numeric data, test for, using TESTN, 374
numeric expressions, 106
numeric indicators, 15
numeric literal value, 23
numeric output editing, 90–97
currency symbol in, 97
edit codes in, 94–96
edit masks and, 91–92
edit words, edit masks for, 90–93
ending positions and, 91