•To discover the set of frequent 2-itemsets, L2, the algorithm uses L1 Join L1to generate a candidate set of 2-itemsets, C2. •Next, the transactions in D are scanned and the support count for each candidate itemset in C2is accumulated (as shown in the middle table). •The set of frequent 2-itemsets, L2, is then determined, consisting of those candidate 2-itemsets in C2having minimum support. •Note:We haven’t used Apriori Property yet.