Pascal's triangle: Difference between revisions

=={{header|UNIX Shell}}==

{{works with|Bourne Again SHell}}

<lang bash>#! /bin/bash

pascal() {

local -i level=${1:-1} n

if (( level <= 1 )); then

echo 1

else

local output=$( $FUNCNAME $((level - 1)) )

set -- $( tail -n 1 <<<"$output" ) # previous row

echo "$output"

n=0

for arg do

printf "%d " $((n + arg))

n=$arg

done

echo 1

fi

}

pascal "$1"</lang>