1. Write a Java program to print “Hello JAVA”

Solution:

Output:

Hello JAVA

2. Write a java program to print the following:

Hello

Welcome to the world of JAVA

Let us learn JAVA

Solution:

Output:

Hello

Welcome to the world of JAVA

Let us learn JAVA

3. Write a Java program to print the sum of two numbers.

Solution:

Output:

The sum is: 30

4. Write a program to calculate the distance that light travels in 1000 days using long variables. Approximate speed of light in miles per second is 86000.

Solution:

Output:

In 1000 days, light will travel about 7430400000000 miles

5. Write a Java program to multiply two Floating-Point numbers.

Solution:

Output:

The product is: 10.349999

The product is: 10.35

6. Write a program to calculate the area of a circle using double.

Solution:

Output:

Area of circle is:346.4055

7. Write a program to use char variable.

Solution:

Output:

ch1 and ch2:X Y

Now ch1 is: Y

8. Write a program to use Boolean values.

Solution:

Output:

b is: false

b is: true

9. Write a program to add two numbers taking input from user.

Solution:

Output:

Enter 2 numbers: 12 34

The sum is: 46

10. Write a Java program that takes two numbers as input and displays the product of two numbers.

Solution:

Output:

Enter 2 numbers: 5 8

The product is: 40

11. Write a Java program to divide two numbers and print them on the screen.

Solution:

Output:

Enter 2 numbers: 40 8

The division value is: 5

12. Write a Java program to print the sum, multiply, subtract, divide and remainder of two numbers.

Solution:

Output:

Enter 2 numbers: 25 5

25 + 5 = 30

25 + 5 = 20

25 + 5 = 125

25 + 5 = 5

25 + 5 = 0

13. Write a java program to find the square of a number.

Solution:

Output:

Square of 5 is: 25

OR

Output:

Enter a number: 8

Square of 8 is: 64

14. Write a java program to find the square of a number using pow() function.

Solution:

Output:

Enter a number: 12

Square of 12.0 is: 144.0

15. Write a java program to find the square root of a number.

Solution:

Output:

Enter a number: 256

Square root of 256.0 is: 16.0

16. Write a Java Program to Calculate Simple Interest.

Solution:

Output:

Simple Interest = 400.0

17. Write a program to calculate simple interest taking input form user.

Solution:

Output:

Enter principal amount: 40000

Enter the rate: 6

Enter the time: 5

The simple interest is: 12000.0

18. Write a Java program to print the area and perimeter of a circle. Given radius=6.7 (Area of Circle=πr², Perimeter of a circle=2πr)

Solution:

Output:

Area of the circle: 141.04438000000002

Area of the circle: 141.044

Perimeter of the circle: 42.1028

Perimeter of the circle: 42.10

19. Write a Java program to find the area and perimeter of a circle whose radius is user input.

Solution:

Output:

Enter the radius of the circle: 6.7
Area of the circle: 141.02609421964584
Perimeter of the circle: 42.09734155810323

20. Write a Java program to find area and perimeter of a square.

Solution:

Output:

Enter the length of side of square: 10

Area of the square: 100.0

Perimeter of the square:40.0

21. Write a JAVA program to convert temperature from Fahrenheit to Celsius degree.

Solution:

Output:

Enter temperature in Fahrenheit: 208.4
Temperature in Celsius: 98.0

22. Write a Java program to calculate total and average marks of three subjects of a student.

Solution:

Output:

Enter marks of 3 subjects: 50 40 60

Total Marks: 150

Average Marks: 50.0

23. Write a Java program to swap two numbers.

Solution:

Output:

Enter two numbers: 10 20

Before swapping:

a= 10  b= 20

After swapping:

a= 20  b= 10

24. Write a Java program to swap two numbers without using third variable.

Solution:

Output:

Enter two numbers: 10 20

Before swapping:

a= 10  b= 20

After swapping:

a= 20  b= 10

25. The basic salary of an employee is input through the keyboard. The DA is 15% of the basic salary while the HRA is 25% of the basic salary. Write a program to calculate his total salary.

Solution:

Output:

Enter basic salary: 40000

Basic Salary: 40000.0

Dearness Allowance: 6000.0

House Rent Allowance: 10000.0

Total Salary: 56000.0

26.Write a Java program to check a number is even or odd.

Solution:

Output-1:

Enter a number: 30

30 is Even Number

Output-2:

Enter a number: 55

55 is Odd Number

27. Write a Java program to find a year is a Leap Year or not

Solution:

Output-1:

Enter a year: 2020

2020 is a leap year

Output-2:

Enter a year: 2025

2025 is not a leap year

28. Write a JAVA program to take three numbers from the user and print the largest number.

Solution:

Output:

Enter 3 numbers: 34 78 12

78 is the largest number

29. Write a Java program to find the largest among three numbers using conditional operator.

Solution:

Output:

Enter 3 numbers: 45 67 12

Largest no is=67

30. Write Java program to check a character is vowel or not.

Solution:

OR

Output:

A is a vowel

31. Write Java program to check a character is vowel or not taking input from user.

Solution:

Output-1:

Enter a character: U

U is a vowel

Output-2:

Enter a character: R

R is not a vowel

32. Write a Java program to print first 100 natural numbers.

                        OR

Write a program in Java to print the number from 1 to 100.

Solution:

Output:

The first 100 natural numbers:

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

33. Write a program in Java to display series of number from 10 to 60.

Solution:

Output:

Numbers from 10 to 60:

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

34. Write a java program to calculate sum of first n natural numbers. 

Solution:

Output:

Enter number to find the sum: 10

Sum of first 10 natural numbers = 55

35. Write a Java program to print the following pattern:

*

* *

* * *

* * * *

* * * * *

Solution:

Output:

*

 * *

 * * *

 * * * *

 * * * * *

36. Write a Java program to print the following pattern:

1

2 2

3 3 3

4 4 4 4

5 5 5 5 5

6 6 6 6 6 6

Solution:

Output:

1

 2 2

 3 3 3

 4 4 4 4

 5 5 5 5 5

 6 6 6 6 6 6

37. Write a Java program to display a specific multiplication table.

Solution:

Output:

Enter a number: 5
Multiplication table of 5
5×1=5
5×2=10
5×3=15
5×4=20
5×5=25
5×6=30
5×7=35
5×8=40
5×9=45
5×10=50

38. Write a Java program to print multiplication table from 1 to 5.

Solution:

Output:

Multiplication table from 1 to 5:

1×1=1

1×2=2

1×3=3

1×4=4

1×5=5

1×6=6

1×7=7

1×8=8

1×9=9

1×10=10

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