Posts Tagged ‘Java Assignments’
Pattern 2 :
1
2 2
3 3 3
4 4 4 4
5 5 5 5 5
Java Program for the above pattern:
import java.util.Scanner;
public class MainClass
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
//Taking rows value from the user
System.out.println("How many rows you want in this pattern?");
int rows = sc.nextInt();
System.out.println("Here is your pattern....!!!");
for (int i = 1; i <= rows; i++)
{
for (int j = 1; j <= i; j++)
{
System.out.print(i+" ");
}
System.out.println();
}
//Close the resources
sc.close();
}
}
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Pattern Programs In Java – Pattern 1
Posted on: May 21, 2018
Q. Write a Java program to print given pattern.
Pattern 1 :
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4 5 6
1 2 3 4 5 6 7
Java Program:
import java.util.Scanner;
public class MainClass
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
//Taking rows value from the user
System.out.println("How many rows you want in this pattern?");
int rows = sc.nextInt();
System.out.println("Here is your pattern....!!!");
for (int i = 1; i <= rows; i++)
{
for (int j = 1; j <= i; j++)
{
System.out.print(j+" ");
}
System.out.println();
}
//Close the resources
sc.close();
}
}
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Objectives :
- Write a Java program to find prime number upto N number
- Write a Java program to print prime number upto N number
- Write a Java program to find prime number upto N number using Command Line Arguments
- Write a Java Program to find prime number upto N number via Command Line Arguments
- Write a Java program to find prime number upto N number using Scanner class
Java Program / Code :
Method 1 : Java Program to find Prime Number upto N number using Scanner class
import java.util.Scanner;
class PrimeNumber
{
public static void main(String[] args)
{
int n,p;
Scanner s=new Scanner(System.in);
System.out.println(“Enter number : ”);
n=s.nextInt();
for(int i=2;i<n;i++)
{
p=0;
for(int j=2;j<i;j++)
{
if(i%j==0)
p=1;
}
if(p==0){
System.out.println(i);
}
}
}
}
Method 2 : Java Program to find Prime Number upto N number using Scanner class and writing function to find prime number
Method isPrime() for checking if a number is prime or not
public class PrimeNumber{
public boolean isPrime(int num) {
if ( num < 2 ){
return false;
}
for (int i = 2; i <= Math.sqrt(num); i++) {
if ( num % i == 0 ) {
return false;
}
}
return true;
}
}
// Mock Test Class to test above code
import java.util.Scanner;
public class Demo
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Please enter a number: ");
int num = scanner.nextInt();
if ( num < 2 ) {
System.out.println("\n There are no Prime Numbers available");
System.exit(0);
}
System.out.println("\n Prime Numbers from 1 to "+ num);
PrimeNumber primeNum = new PrimeNumber();
for (int i = 3; i <= num; i++) {
if ( primeNum.isPrime(i) ) {
System.out.print(", " + i);
}
}
}
}
Method 3 : Java Program to find Prime Number upto N number using Command line input
class PrimeNumber
{
public static void main(String[] args)
{
int n,p;
n=Integer.parseint(args[0]);
for(int i=2;i<n;i++)
{
p=0;
for(int j=2;j<i;j++)
{
if(i%j==0)
p=1;
}
if(p==0){
System.out.println(i);
}
}
}
}
Steps to run above program via command line :
- Compilation : C:\JavaPrograms>javac PrimeNumber.java
- Interpretation : C:\JavaPrograms>java PrimeNumber 20
Output :
2
3
5
7
11
13
17
19
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