#!/bin/bash
fib() {
    # Static input fo N
    N=40
    a=0
    b=1
    for (( i=0; i<=N; i++ ))
    do
        if [ $i -eq $N ]
        then
            return "$a "
        fi
        fn=$((a + b))
        a=$b
        b=$fn

    done
    # End of for loop
}

fib()
done