﻿ Java exercises: Convert a octal number to a hexadecimal number - w3resource # Java Exercises: Convert a octal number to a hexadecimal number

## Java Basic: Exercise-27 with Solution

Write a Java program to convert a octal number to a hexadecimal number.

Octal number: The octal numeral system is the base-8 number system, and uses the digits 0 to 7.

Hexadecimal number: This is a positional numeral system with a radix, or base, of 16. Hexadecimal uses sixteen distinct symbols, most often the symbols 0-9 to represent values zero to nine, and A, B, C, D, E, F (or alternatively a, b, c, d, e, f) to represent values ten to fifteen.

Test Data:
Input any octal number: 100

Pictorial Presentation: Octal to Hexadecimal number Sample Solution:

Java Code:

``````import java.util.Scanner;

public class Exercise27 {
public static void main(String args[])
{
String octal_num, hex_num;
int decnum;
Scanner in = new Scanner(System.in);

System.out.print("Input a octal number : ");
octal_num = in.nextLine();

decnum = Integer.parseInt(octal_num, 8);
hex_num = Integer.toHexString(decnum);

}
}
```
```

Sample Output:

```Input a octal number : 100
```

Flowchart: Java Code Editor:

What is the difficulty level of this exercise?

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## Java: Tips of the Day

initial:

Returns all the elements of an array except the last one. Use Arrays.copyOfRange() to return all except the last one

```public static <T> T[] initial(T[] elements) {
return Arrays.copyOfRange(elements, 0, elements.length - 1);
}
```

Ref: https://bit.ly/3zEKw9u