add greet example

examples/greet

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+# ----------------------
+# sf -- script framework
+# ----------------------
+
+# Declare sf variables
+sfdesc="Greet a person."
+
+# Include sf, this could be replaced with a long oneliner
+source "$(dirname $0)/../sf"
+
+# ----------------------
+# Actual script
+# ----------------------
+
+sfget "Enter your name"                                      # Get input
+echo "Hello ${sfin}!"                                        # Use input
+
+sfask "Do you want to tell me your age"                      # Ask for YES/no
+if [ "$sfin" == true ]; then                                 # Use answer
+    sfget "Enter your Age"                                   # Get input
+    sfask "Is ${sftbf}${sfin}${sftrs} really your age" "no"  # Use input and ask for yes/NO
+    if [ "$sfin" == true ]; then                             # Use answer
+        echo "Great!"
+    else
+        echo "I knew it!"
+    fi
+fi