Print Number Star Right Triangle Pattern Type3

June 23, 2019

PRINT PATTERN  1 4*5*6 2*3

For any input number N Print the following code – For below code N=4

1
4*5*6
2*3
7*8*9*10

PREREQUISITE:

Basic knowledge in Java programming, usage of loops.

ALGORITHM:

  1. Take input from user i.e number of lines required (N value).
  2. Take two loops one for each line (say ‘i’) and other for each digit in a particular line (say ‘j’). i starts from N and j starts from 1.
  3. Take a result variable (say ‘a’) and initialize it with 1, t with 4, k with 3.
  4. Divide the pattern into two i.e, parts even and odd lines.
  5. Here ‘i’ loop is used to access each line from n to 1 and ‘j’ loop is used to print values in each line. j loop is executed until it reaches i-1 value in odd lines and k value in even lines.
  6. Print ‘a’,’t’ value along with * and post increment.
  7. Print the final value ‘a’ and ‘t’ of each line and go to next line.
  8. Repeat the ‘i’ loop until it reaches n.

CODE IN JAVA:

[code language=”java”]
import java.lang.*;
import java.io.*;
class Pattern
{
public static void main(String[] args)throws IOException
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int n,i,j,a=1,t=4,k=3;
System.out.print("Enter N value:");
n=Integer.parseInt(br.readLine());
for(i=1;i<=n;i++)
{
if(i%2!=0)
{
for(j=1;j<(i-1);j++)
{
System.out.print((a++)+"*");
}
System.out.println(a++);
}
else
{
for(j=1;j<k;j++)
{
System.out.print((t++)+"*");
}
System.out.println(t++);
k++;
}
}
}
}
[/code]

 

TAKING INPUT:

DISPLAYING OUTPUT: