The escript shape in Erlang

The smallest Erlang script: main/1 and io:format directives.

%% An escript runs main/1; io:format prints with ~ directives.
main(_) ->
    Exchange = "Kettle Street",
    Lines = 24,
    io:format("Exchange ~s on shift~n", [Exchange]),
    io:format("Lines available: ~p~n", [Lines]),
    io:format("Pairs if fully patched: ~p~n", [Lines div 2]).

How it works

1. An escript runs main/1; the first line is always a comment.
2. ~s formats strings, ~p pretty-prints any term.
3. div is integer division — / would answer a float.

Keywords and builtins used here

• format
• main

The run, in numbers

Lines

7

Characters to type

265

Tokens

65

Three-star pace

70 tpm

At the three-star pace of 70 tokens a minute, this run takes about 56 seconds.

Type this snippet

Step 1 of 3 in Values, step 1 of 31 in Language basics.

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