mathanlalsait@gmail.com

Program:

import java.util.Scanner;

public class Avg 
{
	private static double a;

	public static void main(String args[]) 
	{
		int number = 2;
		int count = 0;
		double sum = 0;
		Scanner sc = new Scanner(System.in);
		System.out.println("The number n is  ");
		int n = sc.nextInt();
		
		while (count < n) 
		{
			if (isPrimenumber(number)) 
			{
				System.out.print(number + " ");
				sum += number;
				a++;
				count++;
			}
			number++;
		}
		System.out.println("\n Sum=" + sum);
		double average = (sum / a);
		System.out.println("\n Average=" + average);
	}

	private static boolean isPrimenumber(int number) 
	{
		for (int i = 2; i <= number / 2; i++) 
		{
			if (number % i == 0) 
			{
				return false;
			}
		}
		return true;
	}
}

Compile:

javac Avg.java
 java Avg

Output:

The number n is: 100

2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 101 103 107 109 113 127 131 137 139 149 151 157 163 167 173 179 181 191 193 197 199 211 223 227 229 233 239 241 251 257 263 269 271 277 281 283 293 307 311 313 317 331 337 347 349 353 359 367 373 379 383 389 397 401 409 419 421 431 433 439 443 449 457 461 463 467 479 487 491 499 503 509 521 523 541 

Sum=24133.0

Average=241.33

Program:

public class Odd 
{
	public static void main(String[] args) 
	{
		int x = 16;
		int y = x % 2;
		if (y == 0) 
		{
			System.out.println("The given number is Even ");
		} 
		else 
		{
			System.out.println("The given number is odd ");
		}
	}
}

Compile:

javac Odd.java
java  Odd 

Output:

The given number is Even

Program:

public class Prime 
{
	public static void main(String args[]) 
	{
		int num = 29;
		boolean flag = false;
		for (int i = 2; i <= num / 2; i++) 
		{
			if (num % i == 0) 
			{
				flag = true;
				break;
			}
		}
		if (!flag)
			System.out.println(num + " is a prime number.");
		else
			System.out.println(num + " is not a prime number.");

	}
}

Compile:

javac Prime.java
java  Prime

Output:

29 is a prime number.

Program:

import java.util.*;

public class SwapWithout 
{
	public static void main(String[] args) 
	{
		int x = 100;
		int y = 200;
		x = x + y;
		y = x - y;
		x = x - y;
		System.out.println("X=" + x + " and Y=" + y);
	}
}

Compile:

javac SwapWithout.java
java SwapWithout

Output:

X=200 and Y=100

Program

public class SwapWith 
{
	public static void main(String[] args) 
	{
		int a = 10;
		int b = 8;
		int temp;
		temp = b;
		b = a;
		a = temp;
		System.out.println(a);
		System.out.println(b);
	}
}

Compile:

javac SwapWith.java
java SwapWith

Output:

8
10

public class ReverseNumber 
{
	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 ReverseNumber.java
java ReverseNumber

Output:

The reverse of the given number is : 123456

public class Print 
{
	public static void main(String args[]) 
	{
		int n = 100;
		System.out.println("Numbers from 1 to 100 is " + n + "are:");
		for (int i = 1; i <= n; i++) 
		{
			System.out.println(i + " ");
		}
	}
}

Compile:

javac Print.java
java Print

Output:

Numbers from 1 to 100 is 100 are:
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
25 
26 
27 
28 
29 
30 
31 
32 
33 
34 
35 
36 
37 
38 
39 
40 
41 
42 
43 
44 
45 
46 
47 
48 
49 
50 
51 
52 
53 
54 
55 
56 
57 
58 
59 
60 
61 
62 
63 
64 
65 
66 
67 
68 
69 
70 
71 
72 
73 
74 
75 
76 
77 
78 
79 
80 
81 
82 
83 
84 
85 
86 
87 
88 
89 
90 
91 
92 
93 
94 
95 
96 
97 
98 
99 
100 

public class Natural 
{
	public static void main(String args[]) 
	{
		int i, num = 10, sum = 0;
		for (i = 1; i <= num; i++) 
		{
			sum = sum + i;
		}
		System.out.println(sum);
	}
}

Compile:

javac Natural.java
java Natural

Output:

55

public class Fibonacci
{
  public static void main(String[] args)
   {
		int n1=0,n2=1,n3,i,count=10;
		System.out.print(n1+" "+n2);
		
		for(i=2;i<count;i++)
		{
			n3=n1+n2;
			System.out.print(" "+n3);
			n1=n2;
			n2=n3;
		}
   }
}

Compile:

javac Fibonacci.java
java Fibonacci

Output:

0 1 1 2 3 5 8 13 21 34

public class ASCII
{
	public static void main(String[] args)
	{
		int i;
		for (i = 0; i <= 127; i++) 
		{
			System.out.println(" The ASCII value of " + (char) i + "=" + i);
		}
	}
}

Compile:

javac ASCII.java
java ASCII

Output:

 The ASCII value of =0
 The ASCII value of =1
 The ASCII value of =2 
 The ASCII value of =3
 The ASCII value of =4
 The ASCII value of =5 
 The ASCII value of =6 
 The ASCII value of =7
 The ASCII value of =8 
 The ASCII value of =9 
 The ASCII value of =10 
 The ASCII value of =11
 The ASCII value of =12 
 The ASCII value of =13
 The ASCII value of =14 
 The ASCII value of =15
 The ASCII value of =16 
 The ASCII value of =17 
 The ASCII value of =18
 The ASCII value of =19
 The ASCII value of .=20
 The ASCII value of =21
 The ASCII value of =22
 The ASCII value of =23
 The ASCII value of =24
 The ASCII value of =25
 The ASCII value of =26
 The ASCII value of =27
 
 The ASCII value of =28
 The ASCII value of =29
 The ASCII value of =30
 The ASCII value of =31
 The ASCII value of  =32
 The ASCII value of !=33
 The ASCII value of "=34
 The ASCII value of #=35
 The ASCII value of $=36
 The ASCII value of %=37
 The ASCII value of &=38
 The ASCII value of '=39
 The ASCII value of (=40
 The ASCII value of )=41
 The ASCII value of *=42
 The ASCII value of +=43
 The ASCII value of ,=44
 The ASCII value of -=45
 The ASCII value of .=46
 The ASCII value of /=47
 The ASCII value of 0=48
 The ASCII value of 1=49
 The ASCII value of 2=50
 The ASCII value of 3=51
 The ASCII value of 4=52
 The ASCII value of 5=53
 The ASCII value of 6=54
 The ASCII value of 7=55
 The ASCII value of 8=56
 The ASCII value of 9=57
 The ASCII value of :=58
 The ASCII value of ;=59
 The ASCII value of <=60
 The ASCII value of ==61
 The ASCII value of >=62
 The ASCII value of ?=63
 The ASCII value of @=64
 The ASCII value of A=65
 The ASCII value of B=66
 The ASCII value of C=67
 The ASCII value of D=68
 The ASCII value of E=69
 The ASCII value of F=70
 The ASCII value of G=71
 The ASCII value of H=72
 The ASCII value of I=73
 The ASCII value of J=74
 The ASCII value of K=75
 The ASCII value of L=76
 The ASCII value of M=77
 The ASCII value of N=78
 The ASCII value of O=79
 The ASCII value of P=80
 The ASCII value of Q=81
 The ASCII value of R=82
 The ASCII value of S=83
 The ASCII value of T=84
 The ASCII value of U=85
 The ASCII value of V=86
 The ASCII value of W=87
 The ASCII value of X=88
 The ASCII value of Y=89
 The ASCII value of Z=90
 The ASCII value of [=91
 The ASCII value of \=92
 The ASCII value of ]=93
 The ASCII value of ^=94
 The ASCII value of _=95
 The ASCII value of `=96
 The ASCII value of a=97
 The ASCII value of b=98
 The ASCII value of c=99
 The ASCII value of d=100
 The ASCII value of e=101
 The ASCII value of f=102
 The ASCII value of g=103
 The ASCII value of h=104
 The ASCII value of i=105
 The ASCII value of j=106
 The ASCII value of k=107
 The ASCII value of l=108
 The ASCII value of m=109
 The ASCII value of n=110
 The ASCII value of o=111
 The ASCII value of p=112
 The ASCII value of q=113
 The ASCII value of r=114
 The ASCII value of s=115
 The ASCII value of t=116
 The ASCII value of u=117
 The ASCII value of v=118
 The ASCII value of w=119
 The ASCII value of x=120
 The ASCII value of y=121
 The ASCII value of z=122
 The ASCII value of {=123
 The ASCII value of |=124
 The ASCII value of }=125
 The ASCII value of ~=126
 The ASCII value of =127