diff --git a/fuction.c b/fuction.c
index aae86ea..fe756d0 100644
--- a/fuction.c
+++ b/fuction.c
@@ -7,6 +7,7 @@ void swap(int *n1, int *n2);
 int main()
 {
     int num1 = 5, num2 = 10;
+    float num2;
 
     // address of num1 and num2 is passed
     swap( &num1, &num2);