Hello world in the IBM PL/I language on the mainframe - M125

and here is the program with the JCL:

//MOSHIXA JOB (PLI),'HELLO ',MSGCLASS=H,REGION=100M,
// CLASS=A,TIME=1440,MSGLEVEL=(1,1),NOTIFY=MOSHIX
//PLICLG EXEC IBMZCPLG,LNGPRFX=IEL420,
// PARM='OBJECT,OPTIONS,SOURCE,XREF,NEST,OPTIMIZE=02,REF,LIST'
//SYSPRINT DD SYSOUT=*
//PLI.SYSIN DD *
HELLO: PROCEDURE OPTIONS(MAIN);
PUT LIST('HELLO,WORLD');
END HELLO;
/*
//

[svenvandevelde]

Pl/I is one of the best programming languages ever made. There is a pre-processor feature that is amazing. I programmed PL/I for years.

[markhodgson]

I used to program in PL/1 (and also C - on a mainframe!) but not for more than 20 years. This was a blast from the past! I liked PL/1 but not the mainframe environment. Seeing JCL again made me shiver...

[grappydingus]

Feel free to do more PL/I videos, I I find this language fascinating!

[frogspawn]

I worked with PL/1 for 15 years - it was the most powerful language I ever came across -especially when linked up with JCL, VSAM, IMS, and DB2

[Nominal_GDP]

I'm here because this language was mentioned in my CS course. Its fascinating to learn how older langauges world

[npkonstan]

PL/I is an excellent language, at least two major Greek Banks continue using it -as of 2024-, and its a lot better than COBOL by design.

[JohnSGruber]

PL/1 was a favorite of mine, too. I haven't used it in about 50 years, however. My other favorites have been IBM assembler, APL, and now Python.

With PL/1 I saw many problems caused by a mismatch in converting the contents of variables of different types. Seems like my idea of what I was asking never matched what the compiler assumed. I adapted by making it a rule for myself to always specify the conversion I wanted explicitly.

Why does the cataloged procedure end in CPLG? I expected simply CLG.

Thanks for posting this.

[charruatrico]

Excelente trabajo, mi historia en Montevideo en los '75 con S370 y luego con S390 me trae muchos recuerdos felices, gracias por tu canal !!!

[simonscummer]

PL/1 was a lot better than COBOL. I particularly liked GOTO - the purists hated it but it got you where you wanted to get to.

[gullyfoyle-uffr]

What nostalgia! In 1977 as a highschool freshman I won the math and computers category of the oklahoma state science fair with my Pl/1 program to compute Punnett squares. I so wish I still had the source code! I didn't have to deal with JCL (though I did later in my pro days). Our mainframe access was interactive-terminal-facility on a 2741, 30CPS teleprinter.

My favorite program to write in any environment is always the "hello world"! Thanks for the series!

[higiniofuentes]

You did again! Very good video about PL/I!
I had and error in statement line 2:
Here is the solution:
//PLI JOB (PLI), 'HELLO ', MSGCLASS=H, REGION=100M,
// CLASS=A, TIME=1440, MSGLEVEL=(1, 1), NOTIFY=&SYSUID
//PLICLG EXEC IBMZCPLG,
// PARM='OBJECT, OPTIONS, SOURCE, XREF, NEST, OPTIMIZE=02, REF, LIST'
...
I had to eliminate: LNGPRFX=IEL420, because is not found in a Z15
Thank you!

[helmutkirchweger]

... goddammit, t'was still real IT back in the days ... currently I'm in touch with PL/1 for a Mainframe-To-Java migration project, kind of a time capsule

[semuhphor]

Thanks! PL/1 is the best compiler for os/mvs/zos. Only assembler is better!

[GotoHere]

What I want to know is who is going to maintain and convert all the COBOL JCL running today.

[feiyechen]

Thanks for the video. Do you have or do you know where can I find PL1 tutorial? It's really hard to find any material on the internet, many COBOL but no PL1...

[joseignaciocastrovonrodrig]

By the way, how does the Yiddish course work? I already know Ladino from my grandparents, so learning Yiddish would be awesome!

[lavaq]

Hello Moshix, can TK4- PL/1 directly read & write VSAM datasets? I know you discussed the fact that the COBOL version doesn't directly read or write VSAM data without Jay Moseley's adaptation.

[joseignaciocastrovonrodrig]

Hello, Mr. Moshix!
Thank you for sharing this with the World!
How do I sign the petition?

[siddharthasekhar]

Sir, help needed, I get a JCL error that the IBMZCPLG procedure was not found .Keeping this in mind that I was not using Hercules / TK 4 but my clients development environment with the same JCL written in a PS file .