UNIX for Dummies Questions & Answers

$ echo 1012345601 | sed -e 's/\(.*\)\(..\)$/\1.\2/' -e :a -e 's/^\([^.]*[0-9]\)\([0-9]\{3\}\)/\1,\2/;ta' -e 's/^/$/'
$10,123,456.01
$

echo 1012345601 | awk '{split(1012345601,a,"")

print "$"a[1] a[2]","a[3] a[4] a[5]","a[6] a[7] a[8]"."a[9] a[10]}'

$ echo 0001012345601 | sed -e 's/^0*//' -e 's/\(.*\)\(..\)$/\1.\2/' -e :a -e 's/^\([^.]*[0-9]\)\([0-9]\{3\}\)/\1,\2/;ta' -e 's/^/$/'
$10,123,456.01