1.
Display odd number between 1 to 100
Program:-
Import java.util.Scanner;
public class OddNumbers1 {
public static void main(String[] args) {
System.out.println( "Odd numbe rs be twe en 1 and 100: " );
for (int i = 1; i <= 100; i++) {
if (i % 2 != 0) {
Sy st em.ou t.print(i + " " );
2. Write a java program to find sum of first n number
Program :
import java. util.Scanner;
public class SumOfN2{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print( "Enter a number (n): " );
int n = sc .next Int();
int sum = 0;
for (int i = 1; i <= n; i++) {
sum += i;
}
System.out.println( "Sum of first " + n + " numbers is: " + sum)
sc . close ();
Output:
Ent e r a numbe r (n): 5
Sum of first 5 numbe rs is: 15
3. Write a java program to find sum of Digit of number
Program :
import java. util.Scanner;
public class SumOfDigits3{
public static void main(String[] args) {
Scanne r sc = new Scanner(System.in);
System.out.print( "Enter a number: " );
int num = sc .next Int();
int sum = 0;
while (num > 0) {
int digit = num % 10;
sum += digit;
num = num / 10;
System.out.println( "Sum of digits: " + sum);
sc . close ();
}
Output:
Ent e r a number: 12345
Sum of digits: 15
4. Write a java program to to calculate eletricity bill based on following
conditions If number of unit is less than 200 3 rupees for unit
If number of unit is Greater than 200 and less than 500 4 rupees per unit
If number of unit is Greater than 500 and less than 1000 5 rupees per
unit
If number of unit is Greater than 1000 and less than 2000 6 rupees per
unit
Program :
import java. util.Scanner;
public class ElectricityBill4 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int units;
double bill;
System.out.print( "Enter number of units consumed: " );
units = s c .nex t Int();
if ( units < 200) {
bil l = units * 3;
} e lse if ( units >= 200 && units < 500) {
bill = units * 4;
} e lse if ( units >= 500 && units < 1000) {
bill = units * 5;
} else if ( units >= 1000 && units < 2000) {
bill = units * 6;
} else {
bill = units * 7;
System.out.println( "Note : For units >= 2000, rate is 7 per unit. " );
System.out.println( " Total Electricity Bill: ₹" + bill);
sc . close ();
Output:
Enter number of units consumed: 450
Total Electricity Bill: ₹1800.0
5. Write a java program to check whether a number is Armstrong or not
Program :
import java. util.Scanner;
public class ArmstrongCheck5 {
public static void main(String[] args)
Scanner sc = new Scanner(System.in);
System.out.print( "Enter a number: " );
int num = sc .next Int();
int original = num;
int sum = 0;
while (num > 0) {
int digit = num % 10;
sum = sum + (digit * digit * digit);
num = num / 10;
if (sum == original) {
System.out.println(original + " is an Armstrong number. " );
} e lse {
System.out.println(original + " is not an Armstrong number. " );
sc . close ();
Output:
Ent e r a number: 155
155 is an Armstrong number.
6. Write a java program to check whether a number is palindrome or not
Program :
import java. util.Scanner;
public class PalindromeCheck6{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println( "Enter a number: " );
int num = sc .next Int();
int original = num;
int reverse = 0;
while (num > 0) {
int digit = num % 10;
reverse = reverse * 10 + digit;
num = num / 10;
if (original == reverse ) {
System.out.println(original + " is a Palindrome number. " );
} else {
System.out.println(original + " is not a Palindrome number. " );
sc . close ();
Output:
Enter a number: 131
131 is a Palindrome number.
7. Write a java program to check whether a number is prime num or not
Program :
import java. util.Scanner;
public class PrimeCheck7{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print( "Enter a number: " );
int num = sc .next Int();
boolean is Prime = true ;
if (num <= 1) {
is Prime = fals e ;
} else {
for (int i = 2; i <= num / 2; i++) {
if (num % i == 0) {
is Prime = false ;
break ;
if (is Prime ) {
System.out.println(num + " is a Prime number. " );
} else {
System.out.println(num + " is not a Prime number. " );
sc . close ();
Output:
Enter a number: 9
9 is a Prime number.
8. Write a java program to print table of particular num
Program :
import java. util.Scanner;
public class Tableprint8{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print( "Enter a number to print its table : " );
int num = sc .next Int();
System.out.println( "Multiplication Table of " + num + " : " );
for (int i = 1; i <= 10; i++) {
System.out.println(num + " x " + i + " = " + (num * i));
sc . close ();
Output:
Enter a number to print its table : 2
Multiplication Table of 2:
2x1=2
2x2=4
2x3=6
...
2 x 10 = 20
9. Write a java program to print pyramid size star.
Program :
import java. util.Scanner;
public class StarPyramid9{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print( "Enter the number of rows for the pyramid: " );
int rows = sc .next Int();
for (int i = 1; i <= rows; i++) {
for (int j = i; j < rows; j++) {
System.out.print( " " );
for (int k = 1; k <= (2 * i - 1); k++) {
System.out.print( "*" );
System.out.println();
sc . close ();
10. Write a java program to create 10 values perform following task
1.Sorts the array
2. Finds the maximum number
3. Finds the minimum number
4.Calculate the average
5.Calculate the sum of all elements
Program :
import java. util.Arrays;
import java. util.Scanner;
public class ArrayOperations10{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int numbers = new int[10];
int sum = 0;
System.out.println( "Enter 10 numbers: " );
for (int i = 0; i < 10; i++) {
numbers[i] = sc .next Int();
sum += numbers[i];
Arrays.sort(numbers);
int min = numbers[0];
int max = numbers[9];
double average = sum / 10.0
System.out.println( "\nSorted Array : " + Arrays.to String(numbers));
System.out.println( "Maximum Number: " + max );
System.out.println( "Minimum Number: " + min);
System.out.println( "Sum of All Numbers: " + sum);
System.out.println( "Average : " + average );
sc . close ();
Output:
Enter 10 numbers:
7 15 6 3 20 5 8 2 9 12
Sort ed Array : [2, 3, 5, 6, 7, 8, 9, 12, 15, 20]
Max imum Numbe r: 20
Minimum Numbe r: 2
Sum of Al l Numbe rs: 97
Average : 9.7
