Update Union_Arrays.cpp

Author: shraddhamishra611

DSA 450 GFG/Union_Arrays.cpp

@@ -1,3 +1,8 @@
+/*
+Union of the two arrays can be defined as the set containing distinct elements from both the arrays.
+If there are repetitions, then only one occurrence of element should be considered in the union.
+The final count should be printed.
+*/
 #include <bits/stdc++.h>
 using namespace std;