mathanlalsait@gmail.com

Program:

public class SecondLarge 
{
	public static void main(String[] args) 
	{
		int[] a = { 25, 122, 33, 45, 56 };
		int largest = a[0];
		int secondLargest = a[0];
		System.out.println("The Given Array is:");

		for (int i = 0; i < a.length; i++) 
		{
			System.out.println(a[i] + "\t");
		}

		for (int i = 0; i < a.length; i++) 
		{
			if (a[i] > largest) 
			{
				secondLargest = largest;
				largest = a[i];
			} 
			else if (a[i] > secondLargest) 
			{
				secondLargest = a[i];
			}
		}
		System.out.println("The Second Largest Number is:" + secondLargest);
	}
}

Compile:

javac SecondLarge.java
 java SecondLarge

Output:

The Given Array is:
25	
122	
33	
45	
56	
The Second Largest Number is:56

Program:

public class Array 
{
	public static void main(String[] args) 
	{
		int a[] = new int[] { 1, 2, 3, 4, 5, 6, 7 };
		System.out.println("The Array Elements:");
		for (int i = 0; i < a.length; i++) 
		{
			System.out.println(a[i]);
		}

	}
}

Compile:

javac  Array.java
 java  Array

Output:

The Array Elements:
1
2
3
4
5
6
7

Explanation:

         Fibonacci series means the next number is the sum of the previous two number.

         The First two number is always 0 and 1.
        
         Step 1: In this program,we use class name as Fibonacci.

         Step 2: In that main method,we declare the variable n1=0;n2=1,n3,i,count=10.

         Step 3: And then use for loop.
    
         Step 4: In that loop,the initalization starts from 2 because 0 and 1 are already 
                 printed.

         Step 5: To find n3 value,add n1 and n2.Now the n3 value will be printed.

         Step 6: Now we assign n2 value to n1 and n3 value to n2 in that statement 

                                      n1=n2;
                                      n2=n3;

         Step 7: And then put the value in the previous step n3=n1+n2.

         Step 8: This process will continue until the loop exixts.

Program:

public class Fibonnaci 
{
	public static void main(String args[]) 
	{
		int n1 = 0, n2 = 1, n3, i, num = 10;
		System.out.println("The fibonacci series are:");
		System.out.print(n1 + " " + n2);
		for (i = 2; i < num; ++i) 
		{
			n3 = n1 + n2;
			System.out.print(" " + n3);
			n1 = n2;
			n2 = n3;
		}
	}
}

Compile:

javac Fibonnaci.java
 java Fibonnaci

Output:

The fibonacci series are:
0 1 1 2 3 5 8 13 21 34

 EXPLANATION:-

   Here we see how to reverse a program using while loop.

STEP1: First write the class name and declare the main method.

STEP2: Initialize the variable int,num,remainder,reverse for the program.

STEP3: Use while loop and find the remainder value by 10 using the modulo of the given program.

STEP4: Then multiply the reverse number by 10 and add the modulo value what we get in the remainder.

STEP5: Next divide the number by 10.

STEP6: Keep on repeat the process until the zero value will appear.

STEP7: Finally we get the reverse value (EG:654321-123456).

Program:

public class Reverse 
{
	public static void main(String[] args) 
	{
		int num = 654321, reverse = 0;
		while (num != 0) 
		{
			int remainder = num % 10;
			reverse = reverse * 10 + remainder;
			num = num / 10;
		}
		System.out.println(" The reverse of the given number is : " + reverse);
	}
}

Compile:

javac Reverse.java
 java Reverse

Output:

 The reverse of the given number is : 123456

EXPLANATION:

    step1: Write the class name and declare the main method.

    step2: Initalize the variable int a,b,temp.

    step3: Give the value for the variable a=10,b=5.

    step4: Assign the third variable as temp.

    step5: Declare temp=a; a=b; b=temp;
                    
    step6: Assign a to a temp variable temp=a;

    step7: Assign b to a variable a=b;

    step8: Assign temp to variable b=temp;

    step9: Now, the value will be swapped. 

Program:

public class Swapvar 
{
	public static void main(String args[]) 
	{
		int a = 10;
		int b = 5;
		b = a + b;
		a = b - a;
		b = b - a;
		System.out.println(a);
		System.out.println(b);
	}

}

Compile:

javac Swapvar.java
 java Swapvar

Output:

5
10

Program:

public class squarePattern 
{
       public static void main(String[] args) 
       {
             int size=9;
             for(int i=0;i<size;i=i+2) 
	     {
                      for(int j=0;j<size;j++) 
	              {
			  System.out.print("*");
	              }
		          System.out.println();
             }
       }
}

Compile:

javac squarePattern.java
 java squarePattern

Output:

*********
*********
*********
*********
*********

Program:

public class Pattern2
{
	public static void main(String args[])
	{
		int a=1;
		for(int i=1;i<=9;i=i+2)
		{
			for(int j=1;j<=i;j++)
			{
				System.out.print(a);

			}
		  System.out.println();
		  a++;
		}
	}
}

Compile:

javac Pattern2.java
 java Pattern2

Output:

1
222
33333
4444444
555555555

Program:

public class Pattern1 
{
	public static void main(String args[]) 
	{
		for (int i = 1; i <= 5; i++) 
		{
			for (int j = 1; j <= i; j++) 
			{
				System.out.print("*");

			}
			System.out.println();
		}
	}
}

Compile:

javac Pattern1.java
 java Pattern1

Output:

*
**
***
****
*****

Program:

public class Power 
{
	public static void main(String[] args) 
	{
		int a = 5, b = 8;
		int n = 1;
		for (int i = 1; i <= 8; i++) 
		{
			n = n * a;
		}
		System.out.println(n);
	}
}

Compile:

javac Power.java
 java Power

Output:

390625