| #!/bin/bash | |
| # Fibonacci numbers | |
| # Writes an infinite series to stdout, one entry per line | |
| function fib() { | |
| local a=1 | |
| local b=1 | |
| while true ; do | |
| echo $a | |
| local tmp=$a | |
| a=$(( $a + $b )) | |
| b=$tmp | |
| done | |
| } | |
| # output the 10th element of the series and halt | |
| fib | head -10 | tail -1 |