diff --git a/archive/r/ruby/sum_of_digits.rb b/archive/r/ruby/sum_of_digits.rb
new file mode 100644
index 000000000..75279f5f0
--- /dev/null
+++ b/archive/r/ruby/sum_of_digits.rb
@@ -0,0 +1,13 @@
+def sum_of_digits(n)
+    sum = 0
+
+    digits = n.to_s.char
+    digits.each do |digits|
+        sum += digits.to_i
+    end
+    
+    sum
+end
+
+n = gets.to_i
+puts sum_of_digits(n)
\ No newline at end of file