diff --git a/SumOfInput.java b/SumOfInput.java
index d84c4b6..ae7ae18 100644
--- a/SumOfInput.java
+++ b/SumOfInput.java
@@ -19,8 +19,11 @@ public SumOfInput()
     }
     
     public Integer oneToNumber(Integer numberToSum){
-
-        return sum;
+        this.sum = 0;
+        for(int i = 1; i <= numberToSum; i++){
+            this.sum+=i;
+        }
+        return this.sum;
     }
 
 }