a() {
for 1 in 1 2 3; do
typeset -F1.1 a
a=$1
done
}
a
echo $a
unset a
echo $a
unset a
echo $a
output:
(anon):typeset: bad precision value: 1.1
(anon):typeset: bad precision value: 1.1
(anon):typeset: bad precision value: 1.1
3.0000000000
2.0000000000
1.0000000000
--
Mikael Magnusson