# Convert Roman Numbers to Decimal Numbers

In this section, you will learn how to convert Roman Numbers to Decimals.

### Convert Roman Numbers to Decimal Numbers

In the previous section, we have illustrated the conversion of Decimal Numbers to Roman. Here we are doing vice-versa i.e, In this sd For this, we have allowed the user to enter Roman Number like X and convert it into decimal i.e 10.

Here is the code:

```import java.util.*;

public class RomanToDecimal {
public static void main(String args[]) {
int decimal = 0;
Scanner input = new Scanner(System.in);
System.out.print("Enter a Roman Number: ");
String roman = input.next();
String romanNumeral = roman.toUpperCase();
int x = 0;
do {
char convertToDecimal = roman.charAt(x);
switch (convertToDecimal) {
case 'M':
decimal += 1000;
break;

case 'D':
decimal += 500;
break;

case 'C':
decimal += 100;
break;

case 'L':
decimal += 50;
break;

case 'X':
decimal += 10;
break;

case 'V':
decimal += 5;
break;

case 'I':
decimal += 1;
break;
}
x++;
} while (x < romanNumeral.length());
System.out.println("Decimal Number is: " + decimal);
}
}
```

Output:

 Enter a Roman Number: XV Decimal Number is: 15