PROGRAMS & FILL IN THE BLANKS

Write a program to input marks of students of 6 subjects & display avg. of best four

Solution:-

import java.io.*;

public class nine

{

public static void main()throws IOException

{

    BufferedReader d=new BufferedReader(new InputStreamReader(System.in));

    int sub[]=new int[6];

    for(int i=0;i<6;i++)

    {

              System.out.println("Enter value of array sub:- ");

sub[i]=Integer.parseInt(d.readLine());

    }

    int temp, tot=0;

    for(int i=0;i<6;i++)

    {  

        for(int j=0;j<6-i-1;j++)

        {

            if(sub[j]<sub[j+1])

            {

                temp=sub[j];

                sub[j]=sub[j+1];

                sub[j+1]=temp;

            }

        }

    }

    for(int i=0;i<4;i++)

    {

        tot=tot+sub[i];

    }

    System.out.println("Average of Best Four Subject := " + (tot/4));

}

}

Output

Enter Value of array sub:-

78

Enter Value of array sub:-

67

Enter Value of array sub:-

98

Enter Value of array sub:-

87

Enter Value of array sub:-

99

Enter Value of array sub:-

100

Average of Best Four Subject := 96

Variable Description

Variable	Type	Purpose
sub[]	Integer array	Storing Six subject’s marks
tot	Integer	For use of sum of best four subject
i	Integer	Counter Varable
J	Integer	Counter Varable
temp	Integer	For use of swaping values

:- Write a program to merge array a & array b in array c.

Solution:-

import java.io.*;

public class eleven

{

public static void main()throws IOException

{

    BufferedReader d=new BufferedReader(new InputStreamReader(System.in));

    int a[]=new int[5];

    int b[]=new int[5];

    int c[]=new int[10];

   

    //Inputing values for array a and b

    for(int i=0;i<5;i++)

    {

        System.out.println("Enter Value of array a:-");

        a[i]=Integer.parseInt(d.readLine());

    }

    for(int i=0;i<5;i++)

    {

        System.out.println("Enter Value of array b:-");

        b[i]=Integer.parseInt(d.readLine());

    }

   

    //Merging value in array c

    int x=0;

    for(int i=0;i<5;i++)

    {

        c[x]=a[i];

        x++;

    }    

    for(int i=0;i<5;i++)

    {

        c[x]=b[i];

        x++;

    }

    System.out.println("Merged Array");

    for(int i=0;i<10;i++)

    {

       System.out.print(c[i]);

    }

}

}

Output

Enter Value of array a:-

2

Enter Value of array a:-

3

Enter Value of array a:-

4

Enter Value of array a:-

5

Enter Value of array a:-

6

Enter Value of array b:-

7

Enter Value of array b:-

3

Enter Value of array b:-

2

Enter Value of array b:-

3

Enter Value of array b:-

4

Merged Array

2345673234

Variable Description

Variable	Type	Purpose
a[]	Integer array	Storing five elements in array
b[]	Integer array	Storing five elements in array
c[]	Integer array	Storing 10 elements after merging array a and b
i	Integer	Counter Variable
j	Integer	Counter Variable
x	Integer	Counter Variable

 Write a program to find common elements of 2 array of integer

Solution:-

import java.io.*;

public class twele

{

public static void main()throws IOException

{

    BufferedReader d=new BufferedReader(new InputStreamReader(System.in));

    int a[]=new int[5];

    int b[]=new int[5];

       

    //Inputing values for array a and b

    for(int i=0;i<5;i++)

    {

        System.out.println("Enter Value of array a:-");

        a[i]=Integer.parseInt(d.readLine());

    }

    for(int i=0;i<5;i++)

    {

        System.out.println("Enter Value of array b:-");

        b[i]=Integer.parseInt(d.readLine());

    }

   

    for(int i=0;i<5;i++)

    {

        for(int j=0;j<5;j++)

        {

            if(a[i]==b[j])

            {

                System.out.println("Common Element is :- " + a[i]+"\t Array a : " +i+ "\t Array b : "+j);

            }

        }

    }

}

}   

Output

Enter Value of array a:-

2

Enter Value of array a:-

3

Enter Value of array a:-

4

Enter Value of array a:-

5

Enter Value of array a:-

6

Enter Value of array b:-

4

Enter Value of array b:-

3

Enter Value of array b:-

5

Enter Value of array b:-

1

Enter Value of array b:-

6

Common Element is :- 3  Array a : 1 Array b : 1

Common Element is :- 4  Array a : 2 Array b : 0

Common Element is :- 5  Array a : 3 Array b : 2

Common Element is :- 6  Array a : 4 Array b : 4

Variable Description

Variable	Type	Purpose
a[]	Integer array	Storing five elements in array
b[]	Integer array	Storing five elements in array
i	Integer	Counter Variable
j	Integer	Counter Variable

Write a program to store the given city names in a single dimension array. Sort these names in alphabetical order.

Input : Delhi, Bangalore, Agra, Mumbai, Calcutta

Output : Agra, Bangalore, Calcutta, delhi, Mumbai

Solution:-

import java.io.*;

public class eight

{

public static void main()throws IOException

{

    BufferedReader d=new BufferedReader(new InputStreamReader(System.in));

    String a[]={"Delhi","Bangalore","Agra","Mumbai","Calcutta"};

    String t=new String();

    for(int i=0;i<5;i++)

    {

        for(int j=i;j<5;j++)

        {

            if(a[i].compareTo(a[j])>0)

            {

                t=a[i];

                a[i]=a[j];

                a[j]=t;

            }

        }

    }

    for(int i=0;i<5;i++)

    {

       System.out.print(a[i]+" , ");

    }

   

}

}

Output

Agra, Bangalore, Calcutta, delhi, Mumbai

Variable Description

Variable	Type	Purpose
a[]	String object array	Storing five city names
t	String object	For use of swaping values
i	Integer	Counter Varable
J	Integer	Counter Varable

wap to check a no. is Armstrong or not.

    Solution:-

import java.io.*;

public class fourteen

{

public static void main()throws IOException

{

    BufferedReader d=new BufferedReader(new InputStreamReader(System.in));

     System.out.println("Enter the value of n:-");

    int n=Integer.parseInt(d.readLine());

    int m=n,s=0,r;

    while(m>0)

    {

        r=m%10;

        s=s+(r*r*r);

        m=m/10;

    }

    if(n==s)

        System.out.println("Number is Armstrong Number");

    else

        System.out.println("Number is not Armstrong Number");

    }

}

Output

Enter the value of n:-

153

Number is Armstrong Number

Variable Description

Variable	Type	Purpose
n	Integer	Storing number for checking
m	Integer	Duplicate copy of n
s	Integer	For doing the sum of digit’s cube
r	Integer	For storing the digit of number

 wap to accept the age of n employees & count the numbers of persons in the following age group

    (i) 26 – 35 (ii) 36 – 45    (iii) 46 – 55

Solution:-

import java.io.*;

public class thirteen

{

public static void main()throws IOException

{

    BufferedReader d=new BufferedReader(new InputStreamReader(System.in));

    System.out.println("Enter the value of n:-");

    int n=Integer.parseInt(d.readLine());

    int age,a=0,b=0,c=0;

    for(int i=1;i<=n;i++)

    {

        System.out.println("Enter the age of a person:-");

        age=Integer.parseInt(d.readLine());

       

        if(age>=26&&age<=35)

            a++;

        if(age>=36&&age<=45)

            b++;

        if(age>=46&&age<=55)

            c++;

    }

    System.out.println("Age Group 26- 35 :- "+a);

    System.out.println("Age Group 36- 45 :- "+b);

    System.out.println("Age Group 46- 55 :- "+c);

}

}

Output

Enter the value of n:-

6

Enter the age of a person:-

36

Enter the age of a person:-

54

Enter the age of a person:-

27

Enter the age of a person:-

52

Enter the age of a person:-

38

Enter the age of a person:-

29

Age Group 26- 35 :- 2

Age Group 36- 45 :- 2

Age Group 46- 55 :- 2

Variable Description

Variable	Type	Purpose
i	Integer	Counter Variable
age	Integer	For storing age of a person
n	Integer	Number of person
a	Integer	For counting no. of person
b	Integer	For counting no. of person
c	Integer	For counting no. of person

Write a program to display the following   

    *

    ***

    *****

    ***

    *

public class tweleb

{

public void main()

{

for(int i=1;i<=5;i=i+2)

{

    for(int j=1;j<=i;j++)

        System.out.print("*");

System.out.println();

}

for(int i=3;i>=1;i=i-2)

{

    for(int j=1;j<=i;j++)

        System.out.print("*");

System.out.println();

}

}

}

Output

    *

    ***

    *****

    ***

    *

Variable Description

Variable	Type	Purpose
i	Integer	Counter Variable
j	Integer	Counter Variable

 Write a program to display the following

    56789

    6789

    789

    89

    9

Solution:-

public class twele

{

public void main()

{

for(int i=5;i<10;i++)

{

    for(int j=i;j<10;j++)

        System.out.print(j);

System.out.println();

}

}

}

Output

56789

6789

789

89

9

 Variable Description

Variable	Type	Purpose
i	Integer	Counter Variable
j	Integer	Counter Variable

 Write a program to find sum of the series using function int fact(int)

//x – x3/3! + x5/5! – x7/7! ……………………xn/n!

Solution:-

public class seven

{

public void main(int n,int x)

{

double sum=0;

int f;

double p;

int sign=1;

for(int i=1;i<=n;i=i+2)

{

    p=Math.pow(x,i);

    f=fact(i);

    sum=sum+(p/f)*sign;

    sign=sign*-1;

}

System.out.println("Sum is :- " + sum);

}

public int fact(int a)

{

    int x=1;

    for(int i=1;i<=a;i++)

        x=x*i;

    return x;

}}

Output

n=5

x=2

Sum is :- 0.9333333333333333

Variable Description

Variable	Type	Purpose
n	Integer	Storing number of terms in series
x	Integer	Storing value of x in series
i	Integer	Counter Variable
f	Integer	Storing factorial of given integer
sum	double	Storing result
p	double	Storing power of given number
a	integer	Passing argument in function fact()
x	integer	Returning value from function fact()