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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 REDHAT

math

math(n) 							 Tcl Math Library							   math(n)

NAME

       math - Tcl Math Library

SYNOPSIS

       package require Tcl 8.2

       package require math ?1.2?

       ::math::cov value value ?value ...?

       ::math::integrate list of xy value pairs

       ::math::fibonacci n

       ::math::max value ?value ...?

       ::math::mean value ?value ...?

       ::math::min value ?value ...?

       ::math::prod value ?value ...?

       ::math::random ?value1? ?value2?

       ::math::sigma value value ?value ...?

       ::math::stats value value ?value ...?

       ::math::sum value ?value ...?

DESCRIPTION

       The math package provides utility math functions.

COMMANDS

       ::math::cov value value ?value ...?
	      Return the coefficient of variation expressed as percent of two or more numeric values.

       ::math::integrate list of xy value pairs
	      Return the area under a "curve" defined by a set of x,y pairs and the error bound as a list.

       ::math::fibonacci n
	      Return the n'th Fibonacci number.

       ::math::max value ?value ...?
	      Return the maximum of one or more numeric values.

       ::math::mean value ?value ...?
	      Return the mean, or "average" of one or more numeric values.

       ::math::min value ?value ...?
	      Return the minimum of one or more numeric values.

       ::math::prod value ?value ...?
	      Return the product of one or more numeric values.

       ::math::random ?value1? ?value2?
	      Return a random number.  If no arguments are given, the number is a floating point value between 0 and 1.  If one argument is given,
	      the number is an integer value between 0 and value1.  If two arguments are given, the number is an integer value between value1  and
	      value2.

       ::math::sigma value value ?value ...?
	      Return the population standard deviation of two or more numeric values.

       ::math::stats value value ?value ...?
	      Return the mean, standard deviation, and coefficient of variation as percent as a list.

       ::math::sum value ?value ...?
	      Return the sum of one or more numeric values.

KEYWORDS

       math, statistics

math									4.2								   math(n)
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