Swap number using java program

1. /*
2. Swap Numbers Java Example
3. This Swap Numbers Java Example shows how to
4. swap value of two numbers using java.
5. */
6.
7. public class SwapElementsExample {
8.
9. public static void main(String[] args) {
10.
11. int num1 = 10;
12. int num2 = 20;
13.
14. System.out.println("Before Swapping");
15. System.out.println("Value of num1 is :" + num1);
16. System.out.println("Value of num2 is :" +num2);
17.
18. //swap the value
19. swap(num1, num2);
20. }
21.
22. private static void swap(int num1, int num2) {
23.
24. int temp = num1;
25. num1 = num2;
26. num2 = temp;
27.
28. System.out.println("After Swapping");
29. System.out.println("Value of num1 is :" + num1);
30. System.out.println("Value of num2 is :" +num2);
31.
32. }
33. }
34.
35. /*
36. Output of Swap Numbers example would be
37. Before Swapping
38. Value of num1 is :10
39. Value of num2 is :20
40. After Swapping
41. Value of num1 is :20
42. Value of num2 is :10
43. */

this program will swap number numbers.

Data Types

Data types
1. Boolean
2. byte
3. char
4. double
5.float
6.int
7.short

next Lesson i will explain to you all data types. .

Break statement in java

Break statement is one of the several control statements Java provide to control the flow of the program. As the name says, Break Statement is generally used to break the loop of switch statement.

Please note that Java does not provide Go To statement like other programming languages e.g. C, C++.

This form of break statement is used to jump out of the loop when specific condition occurs. This form of break statement is also used in switch statement.

For example,


for(int var =0; var < 5 ; var++){
System.out.println("Var is : " + var);
if(var == 3)
break;
}


Labeled Break Statement
The unlabeled version of the break statement is used when we want to jump out of a single loop or single case in switch statement. Labeled version of the break statement is used when we want to jump out of nested or multiple loops.
For example,
Outer:
for(int var1=0; var1 < 5 ; var1++)
{
for(int var2 = 1; var2 < 5; var2++)
{
System.out.println("var1:" + var1 + ", var2:" + var2);

if(var1 == 3)
break Outer;

}
}


next lesson about continue statement

Factoring in java program

this program will show how to get the factorial using java program.

public class NumberFactorial {

public static void main(String[] args) {

int number = 5;

/*
* Factorial of any number is !n.
* For example, factorial of 4 is 4*3*2*1.
*/

int factorial = number;

for(int i =(number - 1); i > 1; i--)
{
factorial = factorial * i;
}

System.out.println("Factorial of a number is " + factorial);
}
}

Find Largest and Smallest Number in an Array using java

/*
Find Largest and Smallest Number in an Array Example
This Java Example shows how to find largest and smallest number in an
array.
*/
public class FindLargestSmallestNumber {

public static void main(String[] args) {

//array of 10 numbers
int numbers[] = new int[]{32,43,53,54,32,65,63,98,43,23};

//assign first element of an array to largest and smallest
int smallest = numbers[0];
int largetst = numbers[0];

for(int i=1; i< numbers.length; i++)
{
if(numbers[i] > largetst)
largetst = numbers[i];
else if (numbers[i] < smallest)
smallest = numbers[i];

}

System.out.println("Largest Number is : " + largetst);
System.out.println("Smallest Number is : " + smallest);
}
}

/*
Output of this program would be
Largest Number is : 98
Smallest Number is : 23

Even or Odd program using java

This program will determine if the number inputted by the user is even or odd.

we use here a modulo operator to get the even or odd numbers.

Modulo - this operator use in programming to get the remainder.

sample program:

import java.util.Scanner;

public class EvenOdd
{
public static void main(String args[])
{
Scanner input=new Scanner(System.in);

int num;

System.out.print("Enter a number:");
num=input.nextInt();

if(num%2==0)
{
System.out.print("Even number");
}
else if(num%2==1)
{
System.out.print("Odd Numbers");
}
}
}

Find Largest and Smallest Number in an Array Example

1./*2. Find Largest and Smallest Number in an Array Example3.
This Java Example shows how to find largest and smallest number in an 4. array.5.*/

public class FindLargestSmallestNumber
{
public static void main(String[] args)
{

//array of 10 numbers11.

int numbers[] = new int[]{32,43,53,54,32,65,63,98,43,23};
//assign first element of an array to largest and smallest14.
int smallest = numbers[0];
int largetst = numbers[0];
for(int i=1; i< numbers.length; i++)
{
if(numbers[i] > largetst)
largetst = numbers[i];
else if (numbers[i] < smallest)
smallest = numbers[i];
}
System.out.println("Largest Number is : " + largetst);
System.out.println("Smallest Number is : " + smallest);
}
}
/*32.Output of this program would be33.
Largest Number is : 9834.
Smallest Number is : 2335.*/