diff --git a/lectures/09-linear search/code/src/com/kunal/EvenDigits.java b/lectures/09-linear search/code/src/com/kunal/EvenDigits.java
index 7b7dddee6..15fd679b8 100644
--- a/lectures/09-linear search/code/src/com/kunal/EvenDigits.java	
+++ b/lectures/09-linear search/code/src/com/kunal/EvenDigits.java	
@@ -33,7 +33,7 @@ static int digits2(int num) {
         if (num < 0) {
             num = num * -1;
         }
-        return (int)(Math.log10(num)) + 1;
+        return (int)(Math.log10(num)) + 1;  //return the number of letters-1 so, we add 1 to it, to make it equal to the length of the number 
     }
 
     // count number of digits in a number