diff --git a/sum.c b/sum.c
index 0ee167a..2cb16a0 100644
--- a/sum.c
+++ b/sum.c
@@ -1,7 +1,5 @@
 #include <stdio.h>
 
-
-
 /** Return the sum of values from a to b
  *  @param a = start value
  *  @param b = final value
@@ -15,8 +13,12 @@
  */ 
 int series(int a, int b){
     //Write code here
-
-    return 0; //EDIT THIS
+	
+	int sum = 0;
+	int i;
+	
+	for (i = 0; i< (b-a+1); i++) sum = sum + (a + i);
+    return sum; //EDIT THIS
 }
 
 
@@ -30,4 +32,4 @@ int main(void) {
     printf("The sum from %d to %d is %d\n",a,b,series(a,b));
 
     return 0;
-}
\ No newline at end of file
+}