Discussion

Why 3 > 2 > 1 gives false

Recently, I saw this question about how does Javascript evaluate an expression: https://twitter.com/GwagsiG/status/1303981215461105670?ref_src=twsrc%5Etfw So, why does 1 < 2 < 3 give true, but 3 > 2 > 1 give false? According to operator precedence an...

Sep 12, 20202 min readkahdev.hashnode.devUpdated Dec 9, 2020Read the article

#javascript

Written by

K

Kah

@kahdev · Perth, Western Australia

View profile

Software developer, runner and backyard chickens

Thanks to some friends, I started programming in high school with QBASIC. Nowadays, I'm a software engineer working mostly in Java and active on Exercism. On weekends, you can find me outside, at a parkrun, tending to the veggie patch or the six backyard chooks.

Responses1

Markdown supported · ⌘↵ to post

M

Mark

Sep 12, 2020

Useful warning to prevent this pitfall!

Some languages like Python understand this syntax (so that 1 < 2 < 3 is the same as 1 < 2 and 2 < 3). Many others give an error. I think Javascript's behaviour is an unfortunate mistake.

Search Hashnode

Why 3 > 2 > 1 gives false

Written by

Responses1