Java units 4 programming

JAVA PROGRAMS
Display odd numbers between 1 -100
class OddNumber {
public static void main(String args[]) {
System.out.println("The Odd Numbers are:");
for (int i = 1; i <= 100; i++) {
if (i % 2 != 0) {
System.out.print(i + " ");
}
}
}
}

Sum of odd numbers between 1 -100
class SumOfNum
{
public static void main(String args[])
{
int sum = 0;
for (int i = 1; i <= 100; i++)
{
if (i % 2 != 0)
{
sum = sum + i;
}
}
System.out.println("The Sum Of 100 Odd Numbers are:" + sum);
}
}

Total number of odd numbers between 1 -100
class TotalNumOfOddNum
{
public static void main(String args[])
{
int count = 0;
for(int i = 1;i <= 100;i++)
{
if(i % 2 != 0)
{
count++;
}
}
System.out.println("The Count Of Odd Numbers are:" + count);
}
}

,Find sum of first n numbers
class SumOfNum
{
public static void main(String args[])
{
int sum = 0;
int n=10;
for(int i = 1;i <= n;i++)
{
sum = sum + i;
}
System.out.println("The Sum Of "+n+" Numbers are:" + sum);
}
}
Find the sum of the digits of a number
public class DigitsSum
{

public static void main(String[] args)
{
int num=251025, rem = 0, sum = 0, temp;
temp = num;

while (num > 0)
{
rem = num % 10;
sum = sum + rem;
num = num / 10;
}

System.out.print("Sum of Digits of " + temp + " is " + sum);
}

}
Calculate electricity bill
public class ElectricBill
{
public static void main(String args[])
{
int units = 123;
int bill = 0;

if (units > 100)
{
if (units >= 200)
{
if (units > 300)
{
bill = units * 8;
}
else

, bill = units * 6;
}
else
bill = units * 5;
}

System.out.println("CHENNAI ELECTRICITY LTD, CHENNAI");
System.out.println("Units Consumed : " + units);
System.out.println("Total Bill : " + bill);
}
}
Java program to find Armstrong number
public class ArmstrongNumber
{
public static void main(String args[])
{
int n, arg, sum = 0, r;

n = 153; // input value
arg = n;
for (int i = 1; i < n; i++)
{
while (n > 0)
{
r = n % 10;
sum = sum + (r * r * r);
n = n / 10;

}

}
if (arg == sum)
{
System.out.println("Given number is armstrong number: " + arg);
}
else
{
System.out.println("Given number is not armstrong number: " + arg);
}
}

}
Program to print Armstrong number between 1 to 1000
public class ArmstrongNumbers
{

public static void main(String[] args)
{
int num,rem,limit=1000, sum = 0;
System.out.print("Armstrong numbers from 1 to N:");
for (int i = 1; i <= limit; i++)

, {
num = i;
while (num > 0)
{
rem = num % 10;
sum = sum + (rem*rem*rem);
num = num / 10;
}

if (sum == i)
{
System.out.print(i + " ");
}
sum = 0;
}

}

}
Print given number in words
public class NumberToWords
{

public void pw(int n, String ch)
{
String one[] = { " ", " One", " Two", " Three", " Four", " Five", " Six", " Seven", " Eight", "
Nine", " Ten"," Eleven", " Twelve", " Thirteen", " Fourteen", "Fifteen", " Sixteen", " Seventeen",
" Eighteen"," Nineteen" };

String ten[] = { " ", " ", " Twenty", " Thirty", " Forty", " Fifty", " Sixty", "Seventy", " Eighty",
" Ninety" };

if (n > 19)
{
System.out.print(ten[n / 10] + " " + one[n % 10]);
}
else
{
System.out.print(one[n]);
}
if (n > 0)
System.out.print(ch);
}

public static void main(String[] args)
{

int n=28;
System.out.print(n);
if (n <= 0)
{