Find ASCII Value()

Step 1: Understanding What ASCII Represents

In programming, ASCII (American Standard Code for Information Interchange) is a standard that is used to represent text in computers, telecommunication devices and other computing devices. Working with ASCII values could mean finding ASCII value of a certain character or printing ASCII value of characters in a string, etc. Every character in a keyboard is assigned to an ASCII value ranging from 0 - 127. Finding an ASCII value for a character in java is easily obtainable by casting the character to an integer.

char character = 'A';
int asciiValue = (int) character;
System.out.println(asciiValue); // 65

In the above snippet, we cast a character to an integer to find its ASCII value which in this case is 65.

Step 2: Creating The Function

Let's proceed and create a function named findAsciiValue in java. The function takes a character as a parameter and returns the ASCII value of that character.

public static int findAsciiValue(char character) {
int asciiValue = (int) character;
return asciiValue;
}

Step 3: Testing The Function

Now that our function is created, let's test it with a couple of characters.

public static void main(String[] args) {
System.out.println(findAsciiValue('A')); //65
System.out.println(findAsciiValue('B')); //66
}

Step 4: Creating a Full Program

Finally, let's make a complete Java program that takes an input from a user using Scanner class and returns the ASCII value of an input character.

import java.util.Scanner; 

public class Main {
public static int findAsciiValue(char character) {
int asciiValue = (int) character;
return asciiValue;
}

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter a character: ");
char character = scanner.next().charAt(0);
System.out.println("ASCII value of " + character + " is: " + findAsciiValue(character));
}
}

In this full program, a character is taken as an input from a user and findAsciiValue function is used to return the ASCII value of the input character.

Conclusion

In this guide, you've taken a step-by-step approach of creating a function to find ASCII values of characters in Java. By applying similar concepts, you can work with ASCII values in multiple ways as per your requirements. You can extend this program to print ASCII values for all characters in a string or perform other ASCII related tasks.