prev=0
next=1
 
 
echo $prev 
 
 
while(true) 
do
 
echo $next 
 
 
 
#add the two numbers 
 sum=$(($prev+$next)) 
#swap 
prev=$next 
 next=$sum 
 sleep 1
done

# Shell scrpt to generate Fibonacci series using recursion
export MINIDX=2                     
Fibonacci ()
{
    idx=$1                
    if [ "$idx" -lt "$MINIDX" ]; then
        echo "$idx"              
    else
        (( --idx ))              
        term1=$( Fibonacci $idx )       
        (( --idx ))              
        term2=$( Fibonacci $idx )       
        echo $(( term1 + term2 ))
    fi
}
echo -n "Enter the number of term : "
read MAXTERM
for (( i=0; i<=$MAXTERM; i++ ))
do                      
    FIBO=$(Fibonacci $i)
    echo -n "$FIBO "
done
echo
exit