Print Number Star Pattern Type 1

June 23, 2019

PRINT PATTERN  1*2*3*4  5*6*7*8

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

1*2*3*4
5*6*7*8
9*10*11*12
13*14*15*16

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 a result variable (say ‘a’) and initialize it with 1.
  3. Take two loops one for each line (say ‘i’) and other for each digit in a particular line (say ‘j’).
  4. Here ‘i’ loop is used to access each line from 1 to N and ‘j’ loop is used to print values in each line. For example in line 2 the value of i=2 and for contents in second line (i.e 5*6*7*8) the value for j for digit 5 is j=1 and for digit 6 is j=2.
  5. Print ‘a’ value along with * and post increment it until the j loop reaches a value less than n.
  6. After the j loop is finished, print the ‘a’ value without * and post increment it and go to next line.
  7. Repeat the ‘i’ loop until it reaches ‘N’ lines.

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;
System.out.print("Enter the number of Lines:");
n=Integer.parseInt(br.readLine()); /* Taking Input*/
for(i=1;i<=n;i++)
{
for(j=1;j<n;j++)
{
System.out.print((a++)+"*");
}
System.out.println(a++);
}
}
}
[/code]

TAKING INPUT:

DISPLAYING OUTPUT:

4 comments on “Print Number Star Pattern Type 1”


  • 2100049006ece

    import java.util.*;
    public class pattern{
    public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    System.out.print(“enter number of rows=”);
    int n=sc.nextInt();
    int k=1;
    for(int i=0;i<n;i++){
    for(int j=0;j<n;j++){
    if(j!=n-1){
    System.out.print((k++)+"*");
    }
    else{
    System.out.print(k++);
    }
    }
    System.out.println();
    }
    }
    }


    • PrepInsta Support

      Hey, Scanner parses input data but BufferedReader only reads a string of characters, BufferedReader is a little bit faster than Scanner. 😇