C# Sharp For Loop : Exercises, Practice, Solution
C# Sharp For Loop [83 exercises with solution]
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1. Write a program in C# Sharp to display the first 10 natural numbers.
Expected Output :
1 2 3 4 5 6 7 8 9 10
Click me to see the solution
2. Write a C# Sharp program to find the sum of the first 10 natural numbers.
Expected Output :
The first 10 natural number is :
1 2 3 4 5 6 7 8 9 10
The Sum is : 55
Click me to see the solution
3. Write a C# Sharp program that displays the sum of n natural numbers.
Test Data : 7
Expected Output :
The first 7 natural number is :
1 2 3 4 5 6 7
The Sum of Natural Number upto 7 terms : 28
Click me to see the solution
4. Write a C# Sharp program to read 10 numbers and find their average and sum.
Test Data :
Input the 10 numbers :
Number-1 :2
...
Number-10 :2
Expected Output :
The sum of 10 no is : 51
The Average is : 5.100000
Click me to see the solution
5. Write a C# Sharp program to display the cube of an integer up to given number.
Test Data :
Input number of terms : 5
Expected Output :
Number is : 1 and cube of the 1 is :1
Number is : 2 and cube of the 2 is :8
Number is : 3 and cube of the 3 is :27
Number is : 4 and cube of the 4 is :64
Number is : 5 and cube of the 5 is :125
Click me to see the solution
6. Write a program in C# Sharp to display the multiplication table of a given integer.
Test Data :
Input the number (Table to be calculated) : 15
Expected Output :
15 X 1 = 15
...
...
15 X 10 = 150
Click me to see the solution
7. Write a program in C# Sharp to display the multiplication table vertically from 1 to n.
Test Data :
Input upto the table number starting from 1 : 8
Expected Output :
Multiplication table from 1 to 8
1x1 = 1, 2x1 = 2, 3x1 = 3, 4x1 = 4, 5x1 = 5, 6x1 = 6, 7x1 = 7, 8x1 = 8
...
1x10 = 10, 2x10 = 20, 3x10 = 30, 4x10 = 40, 5x10 = 50, 6x10 = 60, 7x10 = 70, 8x10 = 80
Click me to see the solution
8. Write a C# Sharp program to display the n terms of odd natural numbers and their sums.
Test Data
Input number of terms : 10
Expected Output :
The odd numbers are :1 3 5 7 9 11 13 15 17 19
The Sum of odd Natural Number upto 10 terms : 100
Click me to see the solution
9. Write a program in C# Sharp to display a right angle triangle with an asterisk.
The pattern like :
* ** *** ****
10. Write a program in C# Sharp to display a pattern like a right angle triangle with a number.
The pattern like :
1 12 123 1234
11. Write a program in C# Sharp to make such a pattern like a right angle triangle with a number which repeats a number in a row.
The pattern like :
1 22 333 4444
12. Write a C# Sharp program to make such a pattern like a right angle triangle with the number increased by 1.
The pattern like :
1 2 3 4 5 6 7 8 9 10
13. Write a program in C# Sharp to make such a pattern like a pyramid with numbers increasing by 1.
1 2 3 4 5 6 7 8 9 10
14. Write a program in C# Sharp to make such a pattern like a pyramid with an asterisk.
* * * * * * * * * *
15. Write a C# Sharp program to calculate the factorial of a given number.
Test Data :
Input the number : 5
Expected Output :
The Factorial of 5 is: 120
Click me to see the solution
16. Write a program in C# Sharp to display the n terms of even natural number and their sum.
Test Data :
Input number of terms : 5
Expected Output :
The even numbers are :2 4 6 8 10
The Sum of even Natural Number upto 5 terms : 30
Click me to see the solution
17. Write a program in C# Sharp to make such a pattern like a pyramid with a number which will repeat the number in the same row.
1 2 2 3 3 3 4 4 4 4
18. Write a program in C# Sharp to find the sum of the series [ 1-X^2/2!+X^4/4!- .........].
Test Data :
Input the Value of x :2
Input the number of terms : 5
Expected Output :
the sum = -0.415873
Number of terms = 5
value of x = 2.000000
Click me to see the solution
19. Write a program in C# Sharp to display the n terms of harmonic series and their sum.
1 + 1/2 + 1/3 + 1/4 + 1/5 ... 1/n terms
Test Data :
Input the number of terms : 5
Expected Output :
1/1 + 1/2 + 1/3 + 1/4 + 1/5 +
Sum of Series upto 5 terms : 2.283334
Click me to see the solution
20. Write a program in C# Sharp to display the pattern like pyramid using an asterisk and each row contain an odd number of an asterisks.
* *** *****
21. Write a program in C# Sharp to display the sum of the series [ 9 + 99 + 999 + 9999 ...].
Test Data :
Input the number or terms :5
Expected Output :
9 99 999 9999 99999
The sum of the series = 111105
Click me to see the solution
22. Write a program in C# Sharp to print Floyd's Triangle.
1 01 101 0101 10101
23. Write a program in C# Sharp to display the sum of the series [ 1+x+x^2/2!+x^3/3!+....].
Test Data :
Input the value of x :3
Input number of terms : 5
Expected Output :
The sum is : 16.375000
Number of terms = 5
The value of x = 3.000000
Click me to see the solution
24. Write a program in C# Sharp to find the sum of the series [ x - x^3 + x^5 - x^7 + x^9 -.....].
Test Data :
Input the value of x : 2
Input number of terms : 5
The sum = 410
Number of terms = 5
The value of x = 2
Click me to see the solution
25. Write a C# Sharp program that displays the n terms of square natural numbers and their sum.
1 4 9 16 ... n Terms
Test Data :
Input the number of terms : 5
Expected Output :
The square natural upto 5 terms are :1 4 9 16 25
The Sum of Square Natural Number upto 5 terms = 55
Click me to see the solution
26. Write a program in C# Sharp to find the sum of the series 1 +11 + 111 + 1111 + .. n terms.
Test Data :
Input the number of terms : 5
Expected Output :
1 + 11 + 111 + 1111 + 11111 +
The Sum is : 12345
Click me to see the solution
27. Write a C# Sharp program for checking if a number is a perfect number.
Test Data :
Input the number : 56
Expected Output :
The positive divisor : 1 2 4 7 8 14 28
The sum of the divisor is : 64
So, the number is not perfect.
Click me to see the solution
28. Write a C# Sharp program to find the ‘perfect’ numbers within a given number range.
Test Data :
Input the starting range or number : 1
Input the ending range of number : 50
Expected Output :
The Perfect numbers within the given range : 6 28
Click me to see the solution
29. Write a C# Sharp program to check whether a given number is an Armstrong number or not.
Test Data :
Input a number: 153
Expected Output :
153 is an Armstrong number.
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30. Write a C# Sharp program to find the Armstrong number for a given range of numbers.
Test Data :
Input starting number of range: 1
Input ending number of range : 1000
Expected Output :
Armstrong numbers in given range are: 1 153 370 371 407
Click me to see the solution
31. Write a program in C# Sharp to display the pattern like a diamond.
*
***
*****
*******
*********
*******
*****
***
*
32. Write a C# Sharp program to determine whether a given number is prime or not.
Test Data :
Input a number: 13
Expected Output :
13 is a prime number.
Click me to see the solution
33. Write a C# Sharp program to display Pascal's triangle.
Test Data :
Input number of rows: 5
Expected Output :
34. Write a program in C# Sharp to find prime numbers within a range of numbers.
Test Data :
Input starting number of range: 1
Input ending number of range : 50
Expected Output :
The prime number between 1 and 50 are :
2 3 5 7 11 13 17 19 23 29 31 37 41 43 47
Click me to see the solution
35. Write a program in C# Sharp to display the first n terms of Fibonacci series.
Fibonacci series 0 1 2 3 5 8 13 .....
Test Data :
Input number of terms to display : 10
Expected Output :
Here is the Fibonacci series upto to 10 terms :
0 1 1 2 3 5 8 13 21 34
Click me to see the solution
36. Write a program in C# Sharp to display such a pattern for n number of rows using a number starting with the number 1. The first and last number of each row will be 1.
1 121 12321
37. Write a program in C# Sharp to display a number in reverse order.
Test Data :
Input a number: 12345
Expected Output :
The number in reverse order is : 54321
Click me to see the solution
38. Write a program in C# Sharp to check whether a number is a palindrome or not.
Test Data :
Input a number: 121
Expected Output :
121 is a palindrome number.
Click me to see the solution
39. Write a C# Sharp program to find the number and sum of all integers between 100 and 200 divisible by 9.
Expected Output :
Numbers between 100 and 200, divisible by 9 :
108 117 126 135 144 153 162 171 180 189 198
The sum : 1683
Click me to see the solution
40. Write a C# Sharp Program to display the following pattern using the alphabet.
A A B A A B C B A A B C D C B A
41. Write a program in C# Sharp to convert a decimal number into binary without using an array.
Test Data :
Enter a number to convert : 25
Expected Output :
The Binary of 25 is 11001.
Click me to see the solution
42. Write a program in C# Sharp to convert a binary number into a decimal number without using array, function and while loop.
Test Data :
Input a binary number :1010101
Expected Output :
The Binary Number : 1010101
The equivalent Decimal Number : 85
Click me to see the solution
43. Write a C# Sharp program to find the HCF (Highest Common Factor) of two numbers.
Test Data :
Input 1st number for HCF: 24
Input 2nd number for HCF: 28
Expected Output :
HCF of 24 and 28 is : 4
Click me to see the solution
44. Write a program in C# Sharp to find the LCM of any two numbers using HCF.
Test Data :
Input 1st number for LCM: 15
Input 2nd number for LCM: 20
Expected Output :
The LCM of 15 and 20 is : 60
Click me to see the solution
45. Write a program in C# Sharp to find the LCM of any two numbers.
Test Data :
Input 1st number for LCM: 15
Input 2nd number for LCM: 20
Expected Output :
The LCM of 15 and 20 is : 60
Click me to see the solution
46. Write a C# Sharp program to convert a binary number into a decimal number using the math function.
Test Data :
Input the binary number :1010100
Expected Output :
The Binary Number : 1010100
The equivalent Decimal Number is : 84
Click me to see the solution
47. Write a C# Sharp program to check whether a number is a Strong Number or not.
Test Data :
Input a number to check whether it is Strong number: 15
Expected Output :
15 is not Strong number.
Click me to see the solution
48. Write a C# Sharp program to find Strong Numbers within a range of numbers.
Test Data :
Input starting range of number : 1
Input ending range of number: 200
Expected Output :
The Strong numbers are :
1 2 145
Click me to see the solution
49. Write a C# Sharp program to find out the sum of the Arithmetic Progress series.
Test Data :
Input the starting number of the A.P. series: 1
Input the number of items for the A.P. series: 10
Input the common difference of A.P. series: 4
Expected Output :
The Sum of the A.P. series are :
1 + 5 + 9 + 13 + 17 + 21 + 25 + 29 + 33 + 37 = 190
Click me to see the solution
50. Write a program in C# Sharp to convert a decimal number into octal without using an array.
Test Data :
Enter a number to convert : 79
Expected Output :
The Octal of 79 is 117.
Click me to see the solution
51. Write a program in C# Sharp to convert an octal number to decimal without using an array.
Test Data :
Input an octal number (using digit 0 - 7) :745
Expected Output :
The Octal Number : 745
The equivalent Decimal Number : 485
Click me to see the solution
52. Write a C# Sharp program to find the sum of the Geometric Progress series.
Test Data :
Input the first number of the G.P. series: 1
Input the number or terms in the G.P. series: 5
Input the common ratio of G.P. series: 2
Expected Output :
The numbers for the G.P. series:
1 2 4 8 16 32
The tn terms of G.P. : 16.000000
The Sum of the G.P. series : 63.000000
Click me to see the solution
53. Write a program in C# Sharp to convert a binary number to octal.
Test Data :
Input a binary number :1001
Expected Output :
The Binary Number : 1001
The equivalent Octal Number : 11
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54. Write a program in C# Sharp to convert an octal number into binary.
Test Data :
Input an octal number :11
Expected Output :
The Octal Number : 11
The equivalent Binary Number : 1001
Click me to see the solution
55. Write a program in C# Sharp to convert a decimal number to hexadecimal. .
Test Data :
Input any Decimal number: 79
Expected Output :
The equivalent Hexadecimal Number : 4F
Click me to see the solution
56. Write a program in C# Sharp to check whether a number can be expressed as the sum of two prime numbers.
Test Data :
Input a positive integer: 16
Expected Output :
16 = 3 + 13
16 = 5 + 11
Click me to see the solution
57. Write a program in C# Sharp to print a string in reverse order.
Test Data :
Input a string to reverse : Welcome
Expected Output :
Reversed string is: emocleW
Click me to see the solution
58. Write a C# Sharp program to display an alphabet pattern like A with an asterisk.
Reversed string is:Display the pattern like 'A' with an asterisk:
---------------------------------------------
***
* *
* *
*****
* *
* *
* *
* *
59. Write a C# Sharp program to display an alphabet pattern like B with an asterisk.
Display the pattern like 'B' with an asterisk:
---------------------------------------------
****
* *
* *
****
* *
* *
****
60. Write a C# Sharp program to display an alphabet pattern like C with an asterisk.
Display the pattern like 'C' with an asterisk:
---------------------------------------------
***
* *
*
*
*
* *
***
61. Write a C# Sharp program to display an alphabet pattern like D with an asterisk.
Display the pattern like 'D' with an asterisk:
---------------------------------------------
****
* *
* *
* *
* *
* *
****
62. Write a C# Sharp program to display an alphabet pattern like E with an asterisk.
Display the pattern like 'E' with an asterisk:
---------------------------------------------
*****
*
*
****
*
*
*****
63. Write a C# Sharp program to display an alphabet pattern like F with an asterisk.
Display the pattern like 'F' with an asterisk:
---------------------------------------------
*****
*
*
****
*
*
*
64. Write a C# Sharp program to display an alphabet pattern like G with an asterisk.
Display the pattern like 'G' with an asterisk:
---------------------------------------------
***
* *
*
* ***
* *
* *
***
65. Write a C# Sharp program to display an alphabet pattern like H with an asterisk.
Display the pattern like 'H' with an asterisk:
---------------------------------------------
* *
* *
* *
*****
* *
* *
* *
66. Write a C# Sharp program to display an alphabet pattern like I with an asterisk.
Display the pattern like 'I' with an asterisk:
---------------------------------------------
*****
*
*
*
*
*
*****
67. Write a C# Sharp program to display an alphabet pattern like J with an asterisk.
Display the pattern like 'J' with an asterisk:
---------------------------------------------
***
*
*
*
*
* *
*
68. Write a C# Sharp program to display an alphabet pattern like K with an asterisk.
Display the pattern like 'K' with an asterisk:
---------------------------------------------
* *
* *
* *
**
* *
* *
* *
69. Write a C# Sharp program to display an alphabet pattern like L with an asterisk.
Display the pattern like 'L' with an asterisk:
---------------------------------------------
*
*
*
*
*
*
*****
70. Write a C# Sharp program to display an alphabet pattern like M with an asterisk.
Display the pattern like 'M' with an asterisk:
---------------------------------------------
* *
* *
** **
* * *
* *
* *
* *
71. Write a C# Sharp program to display an alphabet pattern like N with an asterisk.
Display the pattern like 'N' with an asterisk:
---------------------------------------------
* *
* *
** *
* * *
* **
* *
* *
72. Write a C# Sharp program to display an alphabet pattern like an O with an asterisk.
Display the pattern like 'O' with an asterisk:
---------------------------------------------
***
* *
* *
* *
* *
* *
***
73. Write a C# Sharp program to display an alphabet pattern like P with an asterisk.
Display the pattern like 'P' with an asterisk:
---------------------------------------------
****
* *
* *
****
*
*
*
74. Write a C# Sharp program to display an alphabet pattern like Q with an asterisk.
Display the pattern like 'Q' with an asterisk:
---------------------------------------------
***
* *
* *
* *
* * *
* *
** *
75. Write a C# Sharp program to display an alphabet pattern like R with an asterisk.
Display the pattern like 'R' with an asterisk:
---------------------------------------------
****
* *
* *
****
* *
* *
* *
76. Write a C# Sharp program to display an alphabet pattern like S with an asterisk.
Display the pattern like 'S' with an asterisk:
---------------------------------------------
****
*
*
***
*
*
****
77. Write a C# Sharp program to display an alphabet pattern like T with an asterisk.
Display the pattern like 'T' with an asterisk:
---------------------------------------------
*****
*
*
*
*
*
*
78. Write a C# Sharp program to display an alphabet pattern like U with an asterisk.
Display the pattern like 'U' with an asterisk:
---------------------------------------------
* *
* *
* *
* *
* *
* *
***
79. Write a C# Sharp program to display an alphabet pattern like V with an asterisk.
Display the pattern like 'V' with an asterisk:
---------------------------------------------
* *
* *
* *
* *
* *
* *
*
80. Write a C# Sharp program to display an alphabet pattern like W with an asterisk.
Display the pattern like 'W' with an asterisk:
---------------------------------------------
* *
* *
* *
* *
* * *
* * *
* *
81. Write a C# Sharp program to display an alphabet pattern like X with an asterisk.
Display the pattern like 'X' with an asterisk:
---------------------------------------------
* *
* *
* *
*
* *
* *
* *
82. Write a C# Sharp program to display an alphabet pattern like Y with an asterisk.
Display the pattern like 'Y' with an asterisk:
---------------------------------------------
* *
* *
* *
*
*
*
*
83. Write a C#Sharp program to display an alphabet pattern like Z with an asterisk.
Display the pattern like 'Z' with an asterisk:
---------------------------------------------
*******
*
*
*
*
*
*******
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