Java code to display patterns using do while loop
In this tutorial, we will discuss the concept of Java code to display patterns using do while loop.
In Java, we can use for loop, while loop, do-while loop to display various number, star, alphabet and binary number patterns
In this topic, we demonstrate how to display print some number and star patterns using the nested do-while loop in Java language.
Program 1
Rectangle number pattern
class DoWhilepattern1{
public static void main(String args[]){
int i=0;
do{
int j=1;
while(j<=6)
{
System.out.print(j);
j++;
}
System.out.println();
i++;
}
while(i<=6);
}
}
When the above code is compiled and executed, it produces the following results
123456 123456 123456 123456 123456 123456
Triangle number pattern
Program 2
class NestedDoWhile1{
public static void main(String args[]){
int row=1,column=1;
int x;
do{
x=6;
do{
System.out.print("");
x--;
}while(x>=row);
column=1;
do{
System.out.print(column+" ");
column++;
}while(column<=row);
System.out.println(" ");
row++;
}while (row<=6);
}
}
When the above code is compiled and executed, it produces the following results
1 1 2 1 2 3 1 2 3 4 1 2 3 4 5 1 2 3 4 5 6
Rectangle star pattern
Program 3
class DoWhilepattern1{
public static void main(String args[]){
int i=0;
do{
int j=1;
while(j<=8)
{
System.out.print("*");
j++;
}
System.out.println();
i++;
}
while(i<=6);
}
}
When the above code is compiled and executed, it produces the following results
******** ******** ******** ******** ******** ******** ********
Triangle star pattern
Program4
class NestedDoWhile{
public static void main(String args[]){
int row=1,column=1;
int x;
do{
x=4;
do{
System.out.print("");
x--;
}while(x>=row);
column=1;
do{
System.out.print("*"+" ");
column++;
}while(column<=row);
System.out.println(" ");
row++;
}while (row<=5);
}
}
When the above code is compiled and executed, it produces the following results
* ** *** **** *****
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