diff --git a/C8/ex7.c b/C8/ex7.c
index 53cc081..74c7e5f 100644
--- a/C8/ex7.c
+++ b/C8/ex7.c
@@ -7,7 +7,7 @@ int main() {
 
 	printf("Enter radius: ");
 	rc = scanf("%f", &radius);
-	// scanf returns number of scanned items
+	// scanf returns number of scanned items. If input is invalid then 0 values will have been scanned.
 	if (rc != 1) {
 		printf("Please enter an positive real integer or decimal\n");
 		return 1;
@@ -15,7 +15,7 @@ int main() {
 
 	printf("Enter height: ");
 	rc = scanf("%f", &height);
-	// scanf returns number of scanned items
+	// scanf returns number of scanned items. If input is invalid then 0 values will have been scanned.
 	if (rc != 1) {
 		printf("Please enter an positive real integer or decimal\n");
 		return 1;