Leah Neukirchen / Jun 11 2021 / Published

# J examples

The

Jprogramming language, developed in the early 1990s by Kenneth E. Iverson and Roger Hui, is an array programming language based primarily on APL.

`1 2 3 + 4 5 6`

0.5s

J

### Advent of Code 2020

#### Day 01: Report Repair

… you to

find the two entries that sum to`and then multiply those two numbers together.`

2020

`d=: (".;._2)1!:1<}:}.'_'`

`*/2{.d/:(2020-d)i.d`

0.4s

…

what is the product of the three entries that sum to

2020?

`*/ {:"1 (#"1~ 2020&=@:(+/)) |: d {~ ((#: i.@(*/)) 3 ## d)`

1.0s