Hi everyone … I will share some java source code which will help beginner level programmer to solve basic programming problems..

All code has been solved by : Afjalur Rahman Rana

Note: firstly try to solve the problem by yourself.. then if you can’t see the solution & if you find difficulty to any code then comment below… I will try to give you proper guide 🙂

Problem  #1:

Number Line

Sample input:
6
Sample output
123456

Solution:

import java.util.Scanner;
public class Task1{
  public static void main(String[] args){
    int n;
    Scanner sc = new Scanner(System.in);
    System.out.println("Input a number");
    n = sc.nextInt();
    
    for(int c=1;c<=n;c++){
      System.out.print(c);
    }
  
  }
}

Problem  #2:

Star Line
Print as many stars as given in input

Sample input:
6
Sample output
******

Solution:

import java.util.Scanner;
public class Task2{
  public static void main(String[] args){
    int n;
    Scanner sc = new Scanner(System.in);
    System.out.print("Input a number");
    n = sc.nextInt();
    
    for(int c=1;c<=n;c++){
      System.out.print("*");
    }
  }
}

Problem  #3:

Rectangle Star

Sample input:
4
6
Sample output
******
******
******
******

Solution:

import java.util.Scanner;
public class Task3{
  public static void main(String[] args){
    int n;
    Scanner sc = new Scanner(System.in);
    
    System.out.print("Input row");
    int row = sc.nextInt();
    System.out.print("Input a number");
    n = sc.nextInt();
    //r define as row here
    for(int r = 1;r<=row;r++){
    //c define as column here
    for(int c=1;c<=n;c++){
      System.out.print("*");
    }
    System.out.print("\n");
    }
  }
}

Problem  #4:

Rectangle Number

Sample input:
4
6
Sample output
123456
123456
123456
123456

Solution:

import java.util.Scanner;
public class Task4{
  public static void main(String[] args){
    int n;
    Scanner sc = new Scanner(System.in);
    
    System.out.print("Input row");
    int row = sc.nextInt();
    System.out.print("Input a number");
    n = sc.nextInt();
    //r define as row here
    for(int r = 1;r<=row;r++){
    //c define as row here
    for(int c=1;c<=n;c++){
      System.out.print(c);
    }
    System.out.print("\n");
    }
  
  }
}

Problem  #5:

Triangle – Left Justified
Draw right angled triangle of given height

Sample input:
4
Sample output
*
**
***
****

Solution:

import java.util.Scanner;
public class Task5{
  public static void main(String[] args){
    int n;
    Scanner sc = new Scanner(System.in);
    
    System.out.print("Input row");
    int row = sc.nextInt();
    //r define as row here
    for(int r = 1 ;r<=row;r++){
      //c define as row here
      for(int c=1;c<=r;c++){
      System.out.print("*");
    }
    System.out.print("\n");
    }
  }
}

To be continued……