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fib.sh

 1 #!/bin/sh
 2 # The authors of this work have released all rights to it and placed it
 3 # in the public domain under the Creative Commons CC0 1.0 waiver
 4 # (http://creativecommons.org/publicdomain/zero/1.0/).
 5 # 
 6 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 7 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 8 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 9 # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
10 # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
11 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
12 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
13 # 
14 # Retrieved from: http://en.literateprograms.org/Fibonacci_numbers_(sh)?oldid=19127
15 
16 fib () {
17         n=$1
18         if test $n -lt 2 ;then
19                 echo "$n"
20         else
21                 echo "`fib $(echo $n-1 | bc)`+`fib $(echo $n-2 | bc)`" | bc
22         fi
23 }
24 for n in 1 2 3 4 5 6 7 8 9 10; do
25         echo "fib $n = `fib $n`"
26 done
27 


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