Programing Problems

8/18/2019 Programing Problems

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Intro

Easy Programming

ProblemsA Collection of over 150 beginner’s programs to solve in programming languages like

Java, C, C#, C++, Basic, Python, etc..

The programming problems are arranged according to their difficulty of writing the

easiest solution possible. The problems are also further categorized into several sections.

Also, test cases for the majority of the programs are provided.


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Simple Problems:1. Write a program to print the value of c, when,

=

= = ()

Test Case:

Output -> 13

2. Write a program to print the value of b, when,

=

= + √

Test Case:

Output -> 8.25

3.

A shop decided to give a discount of 10% on all items. Take the price as input and print thediscounted price. Test Case:

Input -> 100

Output -> 90

4. Write a program to print the circumference of a circle. Take the radius as input. Formula of

Circumference is given bellow.

=

Test Case:

Input -> 4

Output -> 25.13

5. Write a program to print the area of a circle. Take the radius as input. Formula of Area is given

bellow.

=

Test Case:

Input -> 4

Output -> 50.24

6. Write a program to print the Simple Interest (SI). Take the principal, rate of interest, time as input.

Formula of SI is given bellow

= × ×

Test Case:

Input -> 4

Output -> 25.13


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7. Write a program to print the temperature in Fahrenheit. Take the temperature in Celsius. Formula

for temperature conversion is given bellow.

= −

Test Case:

Input -> 4

Output -> 39.2

8. Write a program to print the square root of a integer using Math.pow function or its equivalent.

Test Case:

Input -> 4

Output -> 2 (Since, 22 = 4)

9. Write a program to print the value of c, when, =

=

= (− − ) √ ∗

Output -> 1.5

10. Given an integer n, print the reminder when n is divided by 3.Test Case: Test Case 2:

Input -> 18 Input -> 19

Output -> 0 Output -> 1

11. Given an integer n, print a number that is needed to be added to n to make n a multiple of 5.Test Case: Test Case 2:



12.

Given an integer n, return the absolute difference between 25 and n.Test Case: Test Case 2:




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If, else Problems:1. Write a program to print smallest of two integers.

2.

Write a program to print largest of three integers.

3. Take the percentage gained by the user in a test and print whether the user passed or not. To

pass, a person needs to gain a minimum of 40%.

4. Take a number as input from user and print whether the number is odd or even.

Test Case:

Input -> 3

Output -> Odd

5.

Take a number as input from user and print whether the number is a factor of 15. Test Case:Input -> 3

Output -> 3 is a factor of 15.

6. Take three numbers as input from user and print "True" if any of the number is a factor of 18 odd

otherwise print "False". Test Case:

Input -> 9 1 4

Output -> True (Since 9 is a factor of 18.)

7. Write a program to print whether a number is negative or positive or zero.

Test Case:Input -> -2

Output -> Negative

8.

Take two numbers as input from user and print whether they end with the same last digit.

Test Case: Test Case 2:

Input -> 14 24 Input -> 16 23

Output -> True(Both end with no. 4) Output -> False

9. Take two numbers as input from user and print the number which is nearest to 10. Test Case:

Input -> 8 11

Output -> 11 (Since, 11 is nearer to 10 than 8)

10.

Write a program to input any character and print whether it is alphabet or a number or a special

character.

Test Case: Test Case:

Input -> A Input -> @

Output -> A is a alphabet. Output -> @ is a special character.


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11. Write a program to check whether a character is Uppercase or Lowercase alphabet. Test Case:

Input -> A

Output -> Uppercase

12. Take two letters as input and print whether a the first character come before the 2nd one.

Test Case:Input -> A E

Output -> True (Since, A comes before alphabet B)

13.

Write a program to input any year and check whether it is leap year or not.

14. A store sells computer at a rate of $1000 per piece and gives a discount of 12% if the buyer makes

a purchase of over $9900. Write a program to take the number of computers purchased by the

buyer as input and print the price the buyer has to pay.

15. A gamer gets 10 coins each for the first 40 kills and 20 coins each for the next 20 kills and 30 coins

each beyond 60 kills. Take the kills as input and print the coins the gamer gets.Test Case:

Input -> 61 Output -> 500 (Since, (40 * 10) + (20 * 20) + (30 * 1) = 830)

16. Write a program to swap two numbers without using a temp variable. ⍟


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Switch case Problems:1. Take a grade as input from user and greet the user according to the following:

Grade A - Excellent Grade B - Good Work

Grade C - Can Improve more. Grade D - Need to Improve.

2. Take a number from one to nine as input from user and print the number in words.

Test Case:

Input -> 3

Output -> Three

3.

Take the current month as input from user and print the number of days in that month.

Test Case:

Input -> 3

Output -> 31


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Loop problems:1. Write a program to print the alphabets from A-Z.

2.

Take a number as input from user and print its first 5 multiples. Test Case:

Input -> 2

Output -> 2 * 1 = 2

2 * 2 = 4

2 * 3 = 6

2 * 4 = 8

2 * 5 = 10

3.

Take 10 numbers as input from user and print the sum of odd numbers and the product of even

numbers.

4.

Write a program to print all the odd numbers between 1 and 100.

5. Write a program to print all multiples of 3 up to n. Take a number n as input. Test Case:

Input -> 10

Output -> 3 6 9

6. Write a program to print all multiples of 3 & 5 up to n. Take a number n as input.Test Case:

Input -> 10

Output -> 3 5 6 9 10

7. Write a program to check whether a no is power of two or not?Test Case:

Input -> 16

Output -> Yes (Since, (2)4 = 16)

8. Write a program to check whether a no is power of three or not?Test Case:

Input -> 27

Output -> Yes (Since, (3)3 = 27)

9. Take a number as input from user and print the Factorial of that number.

Test Case:Input -> 4

Output -> 24

10.

Take a number as input from user and print whether the number is a prime or not.Test Case:

Input -> 7

Output -> Prime


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11. Take a number as input from user and print a number which results in highest remainder when

divided with the inputted number. Test Case:

Input -> 10

Output -> 6 (Since, 10 % 6 = 4)

12.

Write a program to print all prime number up to a given numbers.

Test Case:

Input -> 15

Output -> 2 3 5 7 11 13

13.

Write a program to print the sum of the first 1000 prime numbers.

Output -> 3682913

Take a number as input from user and print whether the number is a perfect number or not.(A

perfect number is a positive integer that is equal to the sum of its proper positive diviso rs, that is, the sum of its positive divisors excluding the number itself.)

Test Case:

Input -> 6

Output -> Perfect Number (Since, 1 + 2 + 3 = 6)

14. Write a program to take n as input and print the sum of the series ⁄

⁄ … . . ⁄ .

15. Write a program to take n as input and print the sum of the series … . . .

16.

Write a program to take n as input and print the sum of the series … . . .

17. Write a program to take n as input and print the sum of the series ⁄

⁄

⁄ … . .

+.

18.

Write a program to take n as input and print the sum of the series !⁄ !⁄ !⁄ … . . !⁄ .

19. Write a program to take n as input and print the sum of the series . !

+!

++!

… +…+ !

.

20. Take two numbers as input from user and print their hcf. ⍟ Test Case:

Input -> 10 15

Output -> 5

21. Take two numbers as input from user and print their lcm. ⍟ (Lcm = (n1 * n2)/hcf) Test Case:

Input -> 10 15

Output -> 30


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Pattern Problems:Write a program to print the following Patterns.

1.

*

**

***

****

*****

2.

*****

****

***

**

*

3. 1

22

333

4444

55555

4. 5

44

333

2222

11111

5.

55555

4444

333

22

1

6.

11111

2222

333

44

5

7. 1

12

123

1234

12345

8. 5

45

345

2345

12345

9.

1

21

321

4321

54321

10.

5

54

543

5432

54321

11. 12345

1234

123

12

1

12. 12345

2345

345

45

5

13.

A

AB

ABCABCD

ABCDE

14.

E

DE

CDE BCDE

ABCDE


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15. 1

13

135

1357

13579

16. 13579

3579

579

79

9

17.

1123

12345

1234567

123456789

18.

111110000

111

00

1

19.

1

10

101

1010

10101

20.

01010

0101

010

01

0

21. 123

456

789

22. 123

45

6

23.

*

**

***

****

*****

24.

*****

****

***

**

*

25. 1

21

321

4321

54321

26. 1

12

123

1234

12345

27.

0000000000

0 0

0 0

0 0

0000000000

28.

1

2

3

4

5

29. *

***

*****

*******

*********

30. *********

*******

*****

***

*

31. 1 ⍟ 234

56789

32.

1 1 ⍟ 2 2

3

4 4

5 5


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Loop Problems 2:1.

Take a number as input from user and count the number of digits in that number.Test Case:

Input -> 12982

Output -> 5

2.

Write a program to reverse an integer.

Test Case:

Input -> 1245

Output -> 5421

3.

Take a number as input from user and print whether that number is a palindrome or not. (A number is

said to be palindrome if the number remains the same when its digits are reversed.)

Test Case:

Input -> 16461

Output -> Palindrome

4. Take a number as input from user and print the sum of the digits in the number. Test Case:

Input -> 1245

Output -> 12 (Since, 1+2+4+5 = 12)

5. Take a number as input from user and print whether that number is a Harshad number or not. (A

Harshad number “is an integer that is divisible by the sum of its digits”)

Test Case:

Input -> 81

Output -> Harshad Number (Since, 8+1 = 9, and 81/9 = 9)

6. Take a number as input from user and print whether the number is a Armstrong Number.(An Armstrong

number of three digits is an integer such that the s um of the cubes of its digits is equal to the number itself.)

Test Case:

Input -> 371

Output -> True (Since, 33 + 73 + 13 = 371)

7. Take a number as input from user and print whether that number is a Krishnamurthy or not. (It is a

number which is equal to the sum of the factorials of all its digits.)

Input -> 145

Output -> Krishnamurthy Number (Since,1! + 4! + 5! = 1 + 24 + 120 = 145)

8. Take a number as input from user and print the 3rd digit of that number.Test Case:

Input -> 1245

Output -> 4


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9. Take a number as input from user and print the sum of the first and last digits in the number. Test Case:

Input -> 1245

Output -> 6 (Since, 1+5 = 6)

10. Take a number as input from user and print the the number after removing all the 0 digits. ⍟ Test Case: Test Case:Input -> 100305 Input -> 2050


11.

Write a program to take a number from user and print Fibonacci series upto that number.

⍟⍟


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Array Problems:1. Take a array of integers as input and print the sum and average of the even numbers in the array.

Test Case:

Input -> 99 98 94 99 89 100

Output -> 292 97

2. Take a array of integers as input and print the numbers in the array in reverse order. Test Case:

Input -> 1 2 3

Output -> 3 2 1

3. A student wants to find his percentage after exams. Write a program which takes the score of 6

subjects as input and prints his percentage. Test Case:

Input -> 99 98 94 99 89 100

Output -> 96%

4. Take a array of integers as input and print whether the array contains the number 2. Test Case:

Input -> 1 5 4 3

Output -> Array doesn’t contain element 2.

5. Write a program to take 2 arrays with same length and print whether two of them are equal.

6. Write a program to take a array of integers as input and print largest number in the array. Test Case:

Input -> 1 5 4 3

Output -> 5

7. Write a program to take a array of integers as input and print smallest number in the array. Test Case:

Input -> 1 5 4 3

Output -> 1

8. Write a program to take a array of integers as input and print 2nd largest number in the array. Test Case:

Input -> 1 5 4 3

Output -> 4

9.

Take a number as input and print the frequency of the digits in that number.Test Case:

Input -> 10013

Output -> Digit 0 appears 2 times.

Digit 1 appears 2 times.

Digit 3 appears 1 times.


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10. Given two arrays, 1,2,3,4,5 and 2,3,1,0,5 write a program to print the common numbers between

them. Test Case:

Output -> 1 2 3 5

11.

Given two arrays, 1,2,3,4,5 and 2,3,1,0,5 write a program to print which number is not present in

the second array.

Test Case:

Output -> 4

12. Given an array 1,1,2,3,4,2,4,4,7 write a program to count the number of unique elements in the

array.Test Case:

Output -> 5 (Unique elements are 1,2,3,4,7)

13. Given two arrays, 1,2,3,4 and 5,6,7,8 write a program to print the elements alternatingly. Test Case:

Output -> 1 5 2 6 3 7 4 8

14.

Given an arrays, 1,2,3,4,5,6 write a program to reverse the array without using a temp array.

Test Case:

Output -> 6 5 4 3 2 1

15. In an array 1-100 numbers are stored sequentially, one number is missing, write a program to

print the missing number.

16.

Given an array of number 1,2,1,3,4,5 , where one of the number is repeated. Write a program to

print the duplicate number.

Test Case:

Output -> 1

17. Given an array of number int[] a = {100,150,200,300,350} , write a program to take an number as

input and print the element closest to that number in the array.

Test Case 1: 120 Test Case 2: 160


18.

Take an array of integers as input and print the numbers in ascending order.

Test Case:

Input -> 1 5 4 3

Output -> 1 3 4 5

19.

Take an array of integers as input and print the numbers in descending order.

Test Case:

Input -> 1 5 4 3

Output -> 5 4 3 1


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20. Given an array 1,2,50,9, write a program to arrange them such that they form the largest possible

number and print that number. ⍟ Test Case:

Output -> 95021


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String problems:1. Take a string as input from user and print whether the string starts with "a".

Test Case:

Input -> Apple

Output -> String starts with letter a.

2. Write a program to print the first half of a given string. Test Case:

Input -> ABCDEF

Output -> ABC

3. Take a string as input from user and print the number of words in a string.Test Case:

Input -> I am a Boy

Output -> 4

4.

Write a program to print the number of occurrence of the word "Hello" in the given String.

5. Take a string as input from user and print whether the string contains only uppercase or only

lowercase or mixed case letters.Test Case:

Input -> I am a Boy

Output -> I.A.A.B

6. Take a string as input from user and print the first letter in capital of each word separated by ‘.’ in

the string.Test Case:

Input -> I am a Boy Output -> I.A.A.B

7. Take a string as input from user and translate the text to Pig Latin. English is translated to Pig Latin

by taking the first letter of every word, moving it to the end of the word and adding ‘ay’.

Test Case:

Input -> The quick brown fox

Output -> Hetay uickqay rownbay oxfay

8. Write a program to reverse a given string without using reverse() function. Test Case:

Input -> ABCDE

Output -> EDCBA

9. Take a string as input from user and print whether it is palindrome or not.(A palindrome is a word, p hrase,

number, or other sequence of characters which reads the same backward or forward. )

Test Case:

Input -> lol

Output -> Palindrome


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10. Write a program to remove a given word in a string.

11. Write a program to print the number of characters common between two given Strings.

12. Write a program to take an array of strings as input and print them in alphabetical order. ⍟ Test Case:

Input -> {“Duke”,”Andy”,”Andrew”,”Mack”}

Output -> Andrew

Andy

Duke

Mack

13.

Write a program to print first non repeated character of a given String.

Test Case:

Input -> aaaaabcaaaa

Output -> b

14.

Write a program to print the longest substring without repeating characters.

⍟

Test Case:

Input -> aaaaabcaaaa

Output -> abc

15. Write a program to print the longest substring which is a palindrome. ⍟ Test Case:

Input -> abcabbabb

Output -> abba

16. Take two strings as input from user and print whether they are Anagram. ⍟


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Matrix Problems:1. Write a program to check whether two matrices are equal.

2.

Write a program to input a matrix and print whether the matrix is a Sparse Matrix. .(A Sparse Matrix is onewhere the majority of the elements of the matrix is zero) Test Case:

Input ->0 0 11 0 0

Output -> Given Matrix is Sparse Matrix

3. Write a program to input 2 matrices of same size and calculate their sum and print the resultant

matrix.

4.

Write a program to input 2 matrices of same size and calculate their difference and print the

resultant matrix.

5. Write a program to input a matrix and calculate the sum of each row.Test Case:

Input ->1 2 11 3 2

Output -> Sum of 1st row: 4

Sum of 2nd row: 6

6.

Write a program to input a matrix and calculate the sum of each column.Test Case:

Input ->1 22 3

Output -> Sum of 1st column: 3Sum of 2nd column: 5

7. Write a program to input a matrix and calculate the trace of that matrix..(Trace of a matrix is the sum of the

diagonal elements of that matrix) Test Case:

Input ->1 22 3

Output -> 4 (Since, 1 and 3 are diagonals and, 3 + 1 = 4)

8.

Write a program to input a matrix and calculate the sum of opposite diagonals of the matrix.Test Case:

Input ->1 23 3

Output -> 5 (Since, 2 and 3 are opposite diagonals)


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9. Write a program to input a matrix and print whether the matrix is a Identity Matrix. .(A Identity Matrix is a

square matrix where the diagonals elements are 1 and the other elements are 0) Test Case:

Input ->1 00 1

Output -> The given matrix is a Identity Matrix.

10. Write a program to input a matrix and reverse the rows of a matrix and print the resultant matrix.Test Case:

Input ->1 2 34 5 6

Output ->3 2 16 5 4

11. Write a program to input a matrix and reverse the columns of a matrix and print the resultant

matrix.Test Case:

Input ->1 2 34 5 6

Output -> 4 5 61 2 3

12. Write a program to input a matrix and print the transpose of that matrix.Test Case:

Input ->1 2 34 5 6

Output ->

1 42 53 6

13. Write a program to input a matrix and sort the rows of a matrix in ascending order and print the

resultant matrix.Test Case:

Input -> 5 2 17 5 6

Output ->1 2 55 6 7

14. Write a program to input a matrix and sort the columns of a matrix in ascending order and print

the resultant matrix.Test Case:

Input ->5 6 77 5 6

Output ->5 5 67 6 7

15.

Write a program to input 2 matrices of same size and calculate their product and print theresultant matrix. ⍟


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Date & Time:1. Write a program to print the current date and time.

2.

The time in South Africa runs ahead of UTC by 2 hours. Write a program to print the current dateand time in Africa.


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Simple Problems 2:1. Write a program to print 100 random numbers between 12 and 24.

2.

Write a program to print either “Hi” or “Yo” having a chance of 40% and 60% to print respectively.

3. Write a program to convert a lowercase char to uppercase without using .toLowerCase().Hint:

Subtract/Add to Ascii Code


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STL Problems:1. Write a program to remove all duplicate integers in a Vector.

Test Case:

Before ->{ 1 2 2 3 5 2 3}

After -> {1 2 3 5}

2. Write a program to remove the elements in a vector alternatingly.Test Case:

Before ->{ 1 2 3 4 5 6}

After -> {1 3 5}

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Programing Problems