On 2022-03-28 20:43, Seymour J Metz wrote:
I'm fully aware of the initial name; the fact remains that IBM and
SHARE looked at three languages, and that FORTRAN had the least
influence of the three.
Static storage came from FORTRAN.
Edited input-output (format lists) came from FORTRAN.
EXTERNAL came from FORTRAN.
Function references came from FORTRAN.
CALL statements came from FORTRAN.
Computed GO TO came from FORTRAN.
Remote formats came from FORTRAN
Label parameters came from FORTRAN.
Assignment statements came from FORTRAN.
Implied DO came from FORTRAN.
Data-directed I/O came from FORTRAN.
FORMAT statements came from FORTRAN.
DO statements came from FORTRAN.
Most of the language derives from Algol 60
Dynamic arrays and scalars came from ALGOL.
Block structure came from ALGOL.
Explicitly allocated arrays did not come from ALGOL.
Free source form came from Algol.
Conditional statements came from Algol.
No I/O came from Algol.
Generic functions did not come from Algol.
and COBOL,
Data structures came from COBOL.
Picture came from COBOL.
Decimal came from COBOL.
and the most obvious feature from FORTRAN has gone by the
wayside.
These new features were introduced in PL/I:
BIT strings.
scaled fixed binary.
Varying-length strings.
ALLOCATE-able variables.
The means of detecting and intercepting run-time errors.
integer overflow detection.
subscript bounds checking.
string range checking.
preprocessor.
________________________________________
From: IBM Mainframe Discussion List [[email protected]] on
behalf of Robin Vowels [[email protected]]
Sent: Monday, March 28, 2022 4:53 AM
To: [email protected]
Subject: Re: PL/I question
On 2022-03-28 19:10, Seymour J Metz wrote:
Exaclly, especially since Algol 60 was one of the three languages
folded into PL/I.
FORTRAN, not Algol, was the starting-point for PL/I.
It was even called FORTRAN VI.
Features of both Algol and COBOL were incorporated into
the language.
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