function math --description "Perform math calculations in bc" if count $argv >/dev/null switch $argv[1] case -h --h --he --hel --help __fish_print_help math return 0 end # Override the locale so that the output can be used as input set -l LC_NUMERIC C # GNU bc extension set -l BC_LINE_LENGTH 0 set -l out (printf '%g' (echo $argv| bc -l)) test -z "$out"; and return 1 echo $out switch $out case 0 return 1 end return 0 end return 2 end