Program for Display Alphabets in Java using ASCII value

In this article, we will discuss the concept of Program for Display Alphabets in Java using ASCII value

In this post, we are going to learn how to display all the upper case(A to Z) and lower case (a to z) Alphabets using ASCII value in Java programming language

ASCII value of upper case Alphabets letters are between 65 – 90

ASCII value of lower case Alphabets letters are between 97 – 122

Code for Display Alphabets in Java using ASCII value

Program for print upper case and lower case Alphabets Using for loop

The program displays all the upper case and lower case alphabet letters between a to z using for loop in Java language

Program 1

public class DisplayAlphabetsfor{
public static void main(String args[]){
char ch;//char variable declaration
//Printing lower case Alphabets
System.out.println("Lower case Alphabets are: \n");
for(ch=97; ch<=122; ch++){//using ASCII value for lower case Alphabets
System.out.print(ch+" ");
//display Lower case Alphabets with space
}
System.out.print("\n");//move to next line

//Printing upper case Alphabets
System.out.println("Upper case Alphabets are: \n");
for(ch=65; ch<=90; ch++){//using ASCII value for upper case Alphabets
System.out.print(ch+" ");
//display Upper case Alphabets with space
}

}

}

When the above code is executed, it produces the following result

In the above program, we are using two for loops, one is used to print upper case letters and another to print lower case letters

Approach

We will declare a counter variable “ch” of the for loop and initialize it by “65”(for print upper case) or “97” (for print lower case);
The program checks the given condition(ch<=90 (upper case) or ch<=122(lower case) if the condition is true, alphabets will be printed
if the condition is false – loops will be terminated

Program for print upper case and lower case Alphabets Using while loop

The program displays all the upper case and lower case alphabet letters between a to z using while loop in Java language

Program 2

public class DisplayAlphabetswhile{
public static void main(String args[]){
char ch;//char variable declaration
//Printing lower case Alphabets
System.out.println("Lower case Alphabets are: \n");
ch=97; 
while(ch<=122){//using ASCII value for lower case Alphabets
System.out.print(ch+" ");
//display lower case Alphabets with space
 ch++;
}
System.out.print("\n");//move to next line

//Printing upper case Alphabets
System.out.println("Upper case Alphabets are: \n");
ch=65;
while(ch<=90){//using ASCII value for upper case Alphabets
System.out.print(ch+" ");
//display upper case Alphabets with space
 ch++;
}

}

}

When the above code is executed, it produces the following result

In the above program, we are using two while loops, one is used to print upper case letters and another to print lower case letters

Approach

We will declare a counter variable “ch” of the while loop and initialize it by “65”(for print upper case) or “97” (for print lower case);
The program checks the given condition(ch<=90 (upper case) or ch<=122(lower case) if the condition is true, alphabets will be printed
if the condition is false – loops will be terminated

Program for Print upper case and lower case Alphabets Using the do-while loop

The program displays all the upper case and lower case alphabet letters between using the do-while loop in Java language

Program 3

public class DisplayAlphabetsdowhile{
public static void main(String args[]){
char ch;//char variable declaration
//Printing lower case Alphabets
System.out.println("Lower case Alphabets are: \n");
ch=97; 
do{//using ASCII value for lower case Alphabets
System.out.print(ch+" ");
//display lower case Alphabets with space
 ch++;
}while(ch<=122);
System.out.print("\n");//move to next line

//Printing upper case Alphabets
System.out.println("Uppercase Alphabets are: \n");
ch=65;
do{//using ASCII value for upper case Alphabets
System.out.print(ch+" ");
//display upper case Alphabets with space
 ch++;
}while(ch<=90);

}

}

When the above code is executed, it produces the following result

In the above program, we are using two do-while loops, one is used to print upper case letters and another to print lower case letters

Approach

We will declare a counter variable “ch” of the do-while loop and initialize it by “65”(for print upper case) or “97” (for print lower case);
The program checks the given condition(ch<=90 (upper case) or ch<=122(lower case) if the condition is true, alphabets will be printed
if the condition is false – loops will be terminated

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