boolean values for [] and List()

Max Alekseyev on Mon, 08 May 2023 16:57:08 +0200

boolean values for [] and List()

To: pari-users@pari.math.u-bordeaux.fr
Subject: boolean values for [] and List()
From: Max Alekseyev <maxale@gmail.com>
Date: Mon, 8 May 2023 10:55:16 -0400
Delivery-date: Mon, 08 May 2023 16:57:08 +0200
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Why is there a discrepancy between empty vector and empty list?

? if([], print("yes"), print("no"))
no
? if(List(), print("yes"), print("no"))
yes

Regards,

Max

Follow-Ups:
- Re: boolean values for [] and List()
  - From: Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>
- Re: boolean values for [] and List()
  - From: Karim Belabas <Karim.Belabas@math.u-bordeaux.fr>