initial commit

bash/reverse-string/reverse_string.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+[[ $# != 1 ]] && echo "usage: $0 string" && exit 1
+
+
+str=$1
+len=${#str}
+rev=""
+
+for (( i=0; i<len; ++i ))
+do
+    rev="${str:i:1}$rev"
+done
+echo "$rev"