Java Program to find the ASCII value of characaters | technical-arbaab

 How to Print ASCII Value of characters in Java

ASCII stands for American standard code for information interchange. It represents the numerical value of characters. It is a 7 bit character set contains 128 characters In this article we are going to see how to print the ASCII value of characters using Java program here, you will see the two methods by which you can print the ASCII value of characters-

• Assigning a variable into a int variable

• Using type cast

Assigning a variable into a int variable

 public class AsciiValueCheck {  
      public static void main(String[] args)  
      {  
                char a = 'J';  //character whose value wwill find
                int n = a;     //integer variable takes the character value
                System.out.println(n);  //ASCII value of'J' will be printed
      }  
 }  

Output: 

 74  

here, we have created a char type and assign their value into a int variable and simply output it so 74 is the ASCII value of 'J' similarly you can check the rest of the letters.

Another way-

Defining the character value into the integer type directly -

 public class AsciiValueCheck {  
      public static void main(String[] args)  
      {  
                int n = 'A';  
                System.out.println(n);  
      }  
 }  

Output: 

 65  

Using Type Cast

 public class AsciiValueCheck {  
      public static void main(String[] args)  
      {  
                char a = 'A';  
                int n = (int) a;  
                System.out.println(n);  
      }  
 }  

Output:

 65  

Taking character from User and prints accordingly-

Program 01 - "User is asked to enter a character value and corresponding ASCII value is printed ". 

Problem statement - "Taking character input from the user repeatedly and prints their corresponding ASCII value accordingly"-

 import java.util.Scanner;  
 public class AsciiValueCheck {  
      public static void main(String[] args)  
      {  
           Scanner sc = new Scanner(System.in);  
           while(true)  
           {  
           System.out.println("Enter a character whose ASCII value you want to print");  
           char n = sc.next().charAt(0);  
           int asciiValue = (int) n;  
           System.out.println("the ascii value of"+n+"is:"+asciiValue);  
      }  
 }  
 }  

Output:

 Enter a character whose ASCII value you want to print  
 A  
 the ascii value ofAis:65  
 Enter a character whose ASCII value you want to print  
 a  
 the ascii value ofais:97  
 Enter a character whose ASCII value you want to print  
 H  
 the ascii value ofHis:72  
 Enter a character whose ASCII value you want to print  
 Jack  
 the ascii value ofJis:74  //ASCII value of 'J' remember
 Enter a character whose ASCII value you want to print  //running repeatedly

Printing ASCII value from A to Z

If you want to print  the ASCII value of all the characters from 'A' to 'Z' or from 'a' to 'z' you can do this too, just by running a for loop as shown below-

 public class AtoZAscii {  
      public static void main(String[] args)  
      {  
           for(int i=65;i<=90;i++)  
           {  
                System.out.println("the ASCII value of "+(char)i+"is"+i);  
           }  
      }  
 }  

Output:

 the ASCII value of Ais65  
 the ASCII value of Bis66  
 the ASCII value of Cis67  
 the ASCII value of Dis68  
 the ASCII value of Eis69  
 the ASCII value of Fis70  
 the ASCII value of Gis71  
 the ASCII value of His72  
 the ASCII value of Iis73  
 the ASCII value of Jis74  
 the ASCII value of Kis75  
 the ASCII value of Lis76  
 the ASCII value of Mis77  
 the ASCII value of Nis78  
 the ASCII value of Ois79  
 the ASCII value of Pis80  
 the ASCII value of Qis81  
 the ASCII value of Ris82  
 the ASCII value of Sis83  
 the ASCII value of Tis84  
 the ASCII value of Uis85  
 the ASCII value of Vis86  
 the ASCII value of Wis87  
 the ASCII value of Xis88  
 the ASCII value of Yis89  
 the ASCII value of Zis90  

you can also do the same for letter from 'a' to 'z'  running a loop  from 'a' ASCII value to the 'z' ASCII value.