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Full Discussion: Need a little help with functions
Top Forums Shell Programming and Scripting Need a little help with functions Post 302314763 by Glowworm on Sunday 10th of May 2009 01:15:51 AM
Old 05-10-2009
Need a little help with functions
I'm semi new to unix/linux and am trying to convert a program I wrote in C++ to a bash script. It's a program that prints Fibonacci's series. I have found scripts that will do it, but I'm trying persistently to get this one to work. The problem occurs when I try to return a value from the function. I get no return or I have done something wrong within the function itself. Any help would be much appreciated. Here's what I have so far:

#!/bin/bash
#Fibonnaci_Series

fibonacci ()
{
n=$1
if [ $n -le 1 ]
then
return $n
else
l=`fibonacci $((n-1))`
r=`fibonacci $((n-2))`
return $((l+r))
fi
}

echo "Enter the limit for Fibonaaci's Series: "
read limit
for((i=0; i<=$((limit-1)); i++))
do
result=$(fibonacci $i)
echo "Fibonacci(" $((i+1)) ") = $result"
done
 

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LEARN ABOUT DEBIAN

math::fibonacci

Math::Fibonacci(3pm)					User Contributed Perl Documentation				      Math::Fibonacci(3pm)

NAME

       Math::Fibonacci - Fibonacci numbers.

VERSION

	   $Revision: 1.5 $

SYNOPSIS

	   use Math::Fibonacci qw(term series decompose);

	   my $term = term ( 42 );
	   my @series = series ( 42 );
	   my @sum = decompose ( 65535 );

DESCRIPTION

       This module provides a few functions related to Fibonacci numbers.

EXPORTS ON REQUEST

       term(), series() decompose(), isfibonacci()

FUNCTIONS

       term($n)
	   Returns the $n-th term of the Fibonacci sequence. The term is computed using the fast algorithm: "F(n) ~ g^n/sqrt(5)", where g is the
	   golden ratio and ~ means "take the nearest integer".

       series($n)
	   Computes and returns the first $n Fibonacci numbers.

       decompose($int)
	   Decomposes $int into the sum of Fibonacci numbers. Returns the list of Fibonacci numbers.

       isfibonacci($int)
	   Returns the sequence number of $int if it is a Fibonacci number or a non-true value if it is not.

AUTHOR

       Vipul Ved Prakash, <mail@vipul.net>

LICENSE

       Copyright (c) 1999-2001, Vipul Ved Prakash.

       This code is free software; you can redistribute it and/or modify it under the ARTISTIC license (a copy is included in the distribution) or
       under the same terms as Perl itself.

perl v5.8.8							    2008-03-09						      Math::Fibonacci(3pm)
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