Add function to sum up integers.

dotfiles/zshrc.d/total.zsh

@@ -0,0 +1,12 @@
+total() {
+  local sum
+  local arr
+  local n
+  sum=0
+  while read -A arr ; do
+    for n in $arr ; do
+      sum=$(($sum+n))
+    done
+  done
+  print $sum
+}