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File No. 5360-29
Order No. GC28-2046-1 TSS
Systems Reference Library
IBM System/360 Time Sharing System
PL/I Library
Computational Subroutines
This publication gives details of the computational
subroutines available in the PLII Libraxy. These sub-
routines are used by the PL/I compiler in the implemen-
tation of PL/I built-in fUnctions and of the operators
. used in the evaluation of PL/l: expressions. Not all
PL/I built-in functions and expression operators are
-. ----~ ,-- ---_~ .... A.,
PREFACE
This publication provides the PL/I user Us.ful baCKground reading i. provided in
with detailed information about the compu- the following IBM publications:
tational subroutines which are part of the
IBM System/360 Time Sharing System PL/I IBM Sastem/360 princi\les-of Operation,
Library. Or er No. GA22-682
IBM System/360 Time Sharing System:
The reader is assumed to be a TSS/360 conce~tB and Facilities, Order No.
user with a particular concern for perfor- Ge2e- 003
mance information associated with individu-
al subroutines. The numerical analyst is Assembler Language, Order. No.
provided with a description of the Ge2S-2000
algorithms, and a specification of accuracy
and range, where these are considered to be PL~I Reference Manual, Order No.
significant. GC 8-2045
Second Edition (JUDe 1970)
'Ibis is a _jor revisioD of, and _ u s obsolete, the pre-
vious edition, For. C28-2046-0.
This edition is current vitb Version 7, Modification 0, of
IBM System/360 Tiae Sharing System (TSS/360) and vill rellain
in effect for all subsequent versions or lDOdifications of
TSS/360. Significant changes or additions to this publica-
tion vill be provided in nelf editions or Technical
N aosletter 8.
'Ibis publication vas prepared for production uSing an XIII
co:.puter to update the text and to control the page and line
for.at. Paqe impressions for photo-offset printing were
obtained frea an IBM 1403 printer using a special print
cbain.
Requests for copies of IBM publications sbould be INde to
your IBM representative or to the IBM branch office serving
your locality.
A form for reader's comments appears at the back of this pub-
lication. Address any additional comments concerning the
contents of this publication to IBM Corporation. Programming
Publications, Department 636, Neighborhood Road, Kingston.
New York 12401
CCopyriqht International Businsss Machines Corporation 196~ "70
CONTmTS
l.NTP.OOOCTION 1
Module Names 1
CHAPTER 1: STRlr