Currency Converter

[rishanmuyeen]

// last update with the currency values 8/2/2024 package Com; import java.util.*; import java.text.DecimalFormat; public class Converter { public static void main(String[] args){ Scanner input = new Scanner(System.in); double amount,changed_amount,amount_to_convert; int option, current_currency,optionIndex = -1;

    //Prompts
    String[] names_currency ={"$","LKR","INR","Pounds"};
    System.out.println("1.US Dollars\n2.LKR Rupees\n3.INR Rupees\n4.Pounds\nEnter in numeric value");
    System.out.println("Welcome to Currency convertor\nWhat currency do you have?");
    current_currency = input.nextInt();// the input for the current currency

    // setting i variable for the loop to start from 0
    int i = current_currency-1;

    System.out.println("which currency do you want to change to?");
    option = input.nextInt();// input for the which currency to change to

    //To check whether the conversion happens with different currency
    for (int j = 0; j < names_currency.length; j++) {
        if (names_currency[j].equals(names_currency[option - 1])) {
            optionIndex = j;
            break;
        }
    }
    if(current_currency== optionIndex) {
        System.out.println("Please enter different currency values");
    }

    //Gets the amount to convert
    System.out.println("Enter the amount:");
    amount = input.nextDouble();// amount of the current currency

    //verifying the amount
    System.out.println("The total amount is, " + names_currency[i] + amount);// verification

    amount_to_convert = amount;

    //converting the currency to US as benchmark
    if (names_currency[i].equals("LKR")) {
        amount_to_convert = amount / 313.04;
    } else if (names_currency[i].equals("INR")) {
        amount_to_convert = amount / 82.98;
    } else if (names_currency[i].equals("$")) {
        amount_to_convert = amount;
    } else if (names_currency[i].equals("Pounds")) {
        amount_to_convert = amount/0.79;
    }

    //formatting the amount to 2 decimal places
    DecimalFormat df = new DecimalFormat("#.##");

    //converting US dollars to the specific currency
    switch (option){
        case 3:
            changed_amount = amount_to_convert * 82.98 ;
            System.out.println("The converted amount is, INR "+df.format(changed_amount));
            break;
        case 1:
            changed_amount = amount_to_convert;
            System.out.println("The converted amount is, $" + df.format(changed_amount));
            break;
        case 2:
            changed_amount = amount_to_convert * 313.04;
            System.out.println("The converted amount is, LKR" + df.format(changed_amount));
            break;
        case 4:
            changed_amount = amount_to_convert * 0.79;
            System.out.println("The converted amount is, Pounds" + df.format(changed_amount));
            break;
        default:
            System.out.println("Error please select valid inputs");
    }

}

}

[rishanmuyeen]

The provided Java program implements a currency converter that allows users to convert between US Dollars, LKR Rupees, INR Rupees, and Pounds. It prompts the user to select the current currency and the currency they want to convert to, as well as input the amount to convert. The program then performs the conversion based on the latest currency values and displays the converted amount. The currency values are last updated on 8/2/2024. But you could use an API to get current currency rates rather than changing it everyday.