Program to Display all Alphabet between given range using loops in Java

In this article, we will discuss the concept of Program to display all Alphabet between given range using loops in Java programming language

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 between given range using the loops in Java language

Program to display all Alphabet using for loop

The program displays all the upper case and lower case alphabet letters between given range using for loop in Java language

Program 1

import java.util.Scanner;
public class Display_Alphabet_1{
public static void main(String args[]){
char ch,ch1,ch2;//char variable declaration
 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.print("Enter the Starting Alphabets: ");
ch1=scan.next().charAt(0);//store entered first Alphabet in variale ch1

System.out.print("Enter the Ending Alphabets: ");
ch2=scan.next().charAt(0);//store entered last Alphabet in variale ch2

for(ch=ch1; ch<=ch2; ch++){
System.out.print(ch+" ");
//display Alphabets with space
}
}

}

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

Case 1

Enter the starting Alphabets: d
Enter the Ending Alphabets: v
d e f g h i j k l m n o p q r s t u v

Case 2

Enter the starting Alphabets: F
Enter the Ending Alphabets: X
F G H I J K L M N O P Q R S T U V W X

In the above program, we are using a for loop, this is used to print upper case Alphabet letters or lower case Alphabet letters in the given range

Approach

In the above program, the user is asked to enter two Alphabet and entered Alphabet is stored in character variable ch1,ch2;
In this for loop, it is initialized by i=ch1 and checks the condition of (i<=ch2);
If the test expression is true, the program is printed the Alphabets letters between given Alphabets
If the test expression is false, the loop is terminated

Program to print all Alphabet using while loop

Program 2

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

import java.util.Scanner;
public class Display_Alphabet_2{
public static void main(String args[]){
char ch,ch1,ch2;//char variable declaration
 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.print("Enter the Starting Alphabets ");
ch1=scan.next().charAt(0);//store entered first Alphabet in variale ch1

System.out.print("Enter the Ending Alphabets ");
ch2=scan.next().charAt(0);//store entered last Alphabet in variale ch2
ch=ch1; 
while(ch<=ch2){
System.out.print(ch+" ");
//display Alphabets with space
 ch++;
}
}

}

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

Case 1

Enter the starting Alphabets: c
Enter the Ending Alphabets: l
c d e f g h i j k l

Case 2

Enter the starting Alphabets: H
Enter the Ending Alphabets: U
H I J K L M N O P Q R S T U

In the above program, we are using a while loop, this is used to print upper case Alphabet letters or lower case Alphabet letters

Approach

In the above program, the user is asked to enter two Alphabet and entered Alphabet is stored in character variable ch1,ch2;
In this while loop, it is initialized by i=ch1 and checks the condition of (i<=ch2);
If the test expression is true, the program is printed the Alphabets letters between given Alphabets
If the test expression is false, the loop is terminated

Program to print all Alphabet using do-while loop

Program 3

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

import java.util.Scanner;
public class Display_Alphabet_3{
public static void main(String args[]){
char ch,ch1,ch2;//char variable declaration
 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.print("Enter the Starting Alphabets ");
ch1=scan.next().charAt(0);//store entered first Alphabet in variale ch1

System.out.print("Enter the Ending Alphabets ");
ch2=scan.next().charAt(0);//store entered last Alphabet in variale ch2
ch=ch1; 
do{
System.out.print(ch+" ");
//display Alphabets with space
 ch++;
}while(ch<=ch2);
}

}

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

Case 1

Enter the starting Alphabets: d
Enter the Ending Alphabets: u
d i j k l m n o p q r s t u

Case 2

Enter the starting Alphabets: J
Enter the Ending Alphabets: Y
J K L M N O P Q R S T U V W XY

In the above program, we are using a do-while loop, this is used to print upper case Alphabet letters or lower case Alphabet letters

Approach

In the above program, the user is asked to enter two Alphabet and entered Alphabet is stored in character variable ch1,ch2;
In this do-while loop, it is initialized by i=ch1 and checks the condition of (i<=ch2);
If the test expression is true, the program is printed the Alphabets letters between given Alphabets
If the test expression is false, the loop is terminated

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