Fibonacci - Recursion - Pencil Code

[sunnyd...@gmail.com]

I want to create fibonacci series with the pencil code and with recursion. Any help?

[David Bau]

Google for [fibonacci pencil code] - the first example by stezel is nice.  Other things in that directory are also pretty useful.

On Sun, Sep 27, 2015 at 6:30 PM, <sunnyd...@gmail.com> wrote:

I want to create fibonacci series with the pencil code and with recursion. Any help?

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[David Bau]

+the group.

Hello Sunny - it turns out that everything that is done with "await" can be done in plain javascript without "await", although it can be a little more inconvenient.

The key thing to understand is that, in javascript, functions like "readnum" do not return a value: instead, they call a callback function to provide its value.

So you could write something like this:

http://david.pencilcode.net/edit/example/jsfibonacci

function fibonacci(n) {

  if (n <= 2) {

    return 1;

  } else {

    return fibonacci(n-1) + fibonacci(n-2);

  }

}

write("This program generates the Fibonacci Sequence");

write("How far in the sequence do you wish to see?");

read(function(N) {

  for (var j = 1; j <= N; ++j) {

    write(fibonacci(j));

  }

});

Note the last call to "read" takes a single argument, which is the function defining what to do after the user enters a value.

"await" is very helpful for learning, and that is one of the reasons I like beginning in CoffeeScript before moving to Javascript.   Javascript requires understanding callback functions very early on.

David

On Mon, Sep 28, 2015 at 3:35 AM, Sunny Desai <sunnyd...@gmail.com> wrote:

I am trying to create with javascript. Some of the options like await readnum is not available. Even I want to use return. I will really appreciate if you can help. I can provide you the code with which I am trying to achieve it.

Regards,

Sunny Desai