Step 1: Identify the event → The question refers to the 2018 Asian Games, a multi-sport international event organized by the Olympic Council of Asia. Step 2: Clarify the host country → The 2018 Asian Games were hosted by Indonesia, marking the second time the country hosted the event (the first being in 1962). Step 3: Focus on the number of host cities → The Games were not confined to a single city but were co-hosted in multiple Indonesian cities. Step 4: Recall the exact cities → The two official host cities were Jakarta (the capital of Indonesia) and Palembang (the capital of South Sumatra province). Step 5: State the count → Since the Games were jointly hosted in Jakarta and Palembang, the total number of host cities is 2. Step 6: Apply the formatting instruction → The answer must be written without spaces, which a single digit already satisfies. FinalAnswer:2