RosettaCodeData/Task/Fibonacci-sequence/UNIX-Shell/fibonacci-sequence-2.sh
2023-07-01 13:44:08 -04:00

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fib() {
local n=$1
[ $n -lt 2 ] && echo -n $n || echo -n $(( $( fib $(( n - 1 )) ) + $( fib $(( n - 2 )) ) ))
}