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AvoidIfExample.kt

class Currency {
    val map = HashMap<String, String>();
  
    init {
        map.put("India", "Rupee")
        map.put("UK", "Euro")
        map.put("Japan", "Yen")
        map.put("USA", "Dollar")
        map.put("China", "Yuan")
    }


    fun getCurrencyNameOf(country: String): String {
        return map.get(country) ?: "NA"
    }
}

// Call getCurrencyOf from anywhere now by passing string
fun main() {
    val currency = Currency()
    val indianCurrency = currency.getCurrencyNameOf("India")
}