The classical introductory exercise. Just say "Hello, World!".
"Hello, World!" is the traditional first program for beginning programming in a new language or environment.
The objectives are simple:
If everything goes well, you will be ready to fetch your first real exercise.
If you don't know how to run Vader tests, see: Tests.
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This is an exercise to introduce users to using Exercism http://en.wikipedia.org/wiki/%22Hello,_world!%22_program
It's possible to submit an incomplete solution so you can see how others have completed the exercise.
Execute (says hello using default argument): AssertEqual "Hello, World!", Hello() Execute (says hello using name "Bram"): AssertEqual "Hello, Bram!", Hello('Bram') Execute (says hello using name "Bill Joy"): AssertEqual "Hello, Bill Joy!", Hello('Bill Joy')
" " Greet someone or something! " " If no argument is given, return 'Hello, World!'. " If the optional argument is given, greet that name instead. " " Hint: If you're confused by the first line in the function, " read `:help a:0`. " " It also uses the short if-then-else syntax which is " called ternary operator in other languages: " " condition ? true : false " function! Hello(...) abort return 'Hello, ' . (a:0 >= 1 ? a:1 . '!' : 'World!') endfunction
A huge amount can be learned from reading other people’s code. This is why we wanted to give exercism users the option of making their solutions public.
Here are some questions to help you reflect on this solution and learn the most from it.