Alphabet triangle pattern using do-while loop in Java

Alphabet triangle pattern using the do-while loop in Java

In this article, we will discuss the concept of Alphabet triangle pattern using the do-while loop in Java programming language.

We can print various type of number, asterisk, binary patterns using for, while and do-while loop in Java language

In this post, we will discuss how to write a program to print different alphabet triangle pattern using the do-while loop in Java language.

 

To understand this example programs, you should have previous knowledge of following Java topics

Do while loop in Java language

Nested do while loop in Java language

 

Alphabet pattern using the do-while loop in Java

Program to Alphabet  pattern 1

Program 1

import java.util.Scanner;
class AlphabetPatternDoWhile1{
public static void main (String args[]){
int i,j;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows");
//get input from the user to number of rows
int rows=scan.nextInt();
i=1;
do{//outer loop
    j=1;
  do{//inner loop
  System.out.print((char)(i+64));

j++;
}while( j<=i);//End of inner loop
System.out.println();
i++;
}while( i<=rows);//End of outer loop

}

}

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

 

Program to Alphabet  pattern 2

Program 2

import java.util.Scanner;
class AlphabetPatterndowhile2{
public static void main (String args[]){
int i,j;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows");
//Takes input from the user to number of rows
int rows=scan.nextInt();
i=1;
do{
    j=1;
  do{
  System.out.print((char)(j+letter));

j++;
}while( j<=i);
System.out.println();
i++;
}while(i<=rows);

}
}

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

Program to Alphabet  pattern 3

Program 3

import java.util.Scanner;
class AlphabetPatterndowhile3{
public static void main (String args[]){
int i,j;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user to number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=rows;
do{
    j=rows;
  do{
  System.out.print((char)(j+letter));
j--;
}while( j>=i);
System.out.println();
i--;
}while(i>=1);

}

}

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

 

Program to Alphabet  pattern 4

Program 4

import java.util.Scanner;
class AlphabetPatterndowhile4{
public static void main (String args[]){
int i,j;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user to number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=rows;
while(i>=1){
    j=1;
  while(j<=i){
  System.out.print((char)(j+letter));
   j++;
}

System.out.println();
 i--;
}
}
}

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

 

Program to Alphabet pattern 5

Program 5

import java.util.Scanner;
class AlphabetPatterndowhile5{
public static void main (String args[]){
int i,j;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user to number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=1;
do{
    j=rows;
do{
  System.out.print((char)(i+letter));
  j--;
}  while(j>=i);

System.out.println();
 i++;
}while(i<=rows);
}
}

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

 

Program to Alphabet  pattern 6

Program 6

import java.util.Scanner;
class AlphabetPatterndowhile6{
public static void main (String args[]){
int i,j;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user to number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=rows;
do{
    j=i;
 do{
  System.out.print((char)(j+letter));
  j++;
} while(j<=rows);

System.out.println();
 i--;
}while(i>=1);
}
}

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

 

 

Program to Alphabet pattern 7

Program 7

import java.util.Scanner;
class AlphabetPatterndowhile7{
public static void main (String args[]){
int i,j;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user to number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=1;
do{
j=i;
  do{
  System.out.print((char)(j+letter));
   j--;
}while( j>=1);

System.out.println();
 i++;
}while(i<=rows)
}
}

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

Program to Alphabet pattern 8

Program 8

import java.util.Scanner;
class AlphabetPatterndowhile8{
public static void main (String args[]){
int i,j;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user to number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=1; 
do{
    j=1;
 do{
  System.out.print((char)(rows-i+1+letter));
  j++;
} while( j<=i);
System.out.println();
 i++;
}while(i<=rows);
}
}

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

Program to Alphabet  pattern 9

Program 9

import java.util.Scanner;
class AlphabetPatterndowhile9{
public static void main (String args[]){
int i,j;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user to number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=rows;
do{
j=1;
 do{
  System.out.print((char)(i+letter));
   j++;
} while( j<=i);

System.out.println();
i--;
}while(i>=1);
}
}

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

 

Program to Alphabet  pattern 10

Program 10

import java.util.Scanner;
class AlphabetPatterndowhile10{
public static void main (String args[]){
int i,j;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user to number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=rows;
do{
    j=i; 
  do{
  System.out.print((char)(j+letter));
  j--;
}while(j>=1);

System.out.println();
 i--;
}while( i>=1);
}
}

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

Program to Alphabet pattern 11

Program 11

import java.util.Scanner;
class AlphabetPatterndowhile11{
public static void main (String args[]){
int i,j,k=1;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user for number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=1;
do{
    j=1;
  do{
  System.out.print((char)(k+letter));
  j++;
  k++;
}while( j<=i);

System.out.println();
 i++;
}while( i<=rows);
}
}

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

 

Program to Alphabet  pattern 12

Program 12

import java.util.Scanner;
class AlphabetPatterndowhile12{
public static void main (String args[]){
int i,j,k=1;
int letter=64;
int num,count;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user for number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=1;
do{
    num=rows-1;
    count=i;
    j=1;
  do{
  System.out.print((char)(count+letter));
  count=count+num;
  num--;
  j++;
}while( j<=i);

System.out.println();
 i++;
}while(i<=rows);
}
}

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

 

Program to Alphabet pattern 13

Program 13

import java.util.Scanner;
class AlphabetPatternDowhile{
public static void main (String args[]){
int i,j,k;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user for number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=rows;
while( i>=1){
    k=i;
    j=1;
  while(j<=i){
  System.out.print((char)(k+letter));
 j++;
 k++;
}

System.out.println();
i--;
}
}
}

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

Program to Alphabet  pattern 14

Program 14

import java.util.Scanner;
class AlphabetPatterndowhilefif{
public static void main (String args[]){
int i,j;
int letter=64;
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");
//get input from the user for number of rows
int rows=scan.nextInt();
System.out.print("\nYour pattern here\n\n");
i=1;
do{
    j=i;
 do{
  System.out.print((char)(j+letter));
  j++;
} while( j<=rows);

System.out.println();
 i++;
}while( i<=rows);
}
}

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

 

 

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