100 C Programs Frequently Asked in Technical Interview.

Here we bring you a collection of 100 C Programs which are frequently asked in technical interviews and semester exams. 

Just click on the links given below to view the sample code.



1. C Program To Print Welcome Message.
2. C Program To Accept & Display A Number.
3. C Program To Add Two Numbers.
4. C Program To Perform Arithmetic Operations.
5. C Program To Print Sum Of Digits In A Number.


6. C Program To Find The Sum Of N Numbers.

7. C Program To Print Sum Of Series 1 + 3 + 5 + …. N.
8. C Program To Print The System Date.
9. C Program To Swap Two Numbers Using Temporary Variables.
10. C Program To Swap Two Numbers Without Using Temporary Variables.


11. C Program To Read Two Numbers And Print The Sum Of Given Two Numbers.
12. C Program To Accept Student Roll No, Marks in 3 Subjects and Calculate Total, Average and Print it.
13. C Program To Read Three Numbers And Print The Biggest Of Given Three Numbers.
14. C Program To Print Sum Of Individual Digits Of Given Number.
15. C Program To Accept A Three Digit Number & Print The Sum Of Individual Digits.


16. C Program To Print First Ten(10) Natural Numbers.
17. C Program To Print Natural Numbers From 1 To 10 In Reverse Order.
18. C Program To Print Sum Of The Natural Numbers From 1 to 10.
19. C Program To Print ODD Numbers From 1 to 10.
20. C Program To Accept A Number & Print Mathematical Table Of The Given No.

21. C Program To Print 1 To 10 Mathematical Tables.
22. C Program To Accept A Character In Any Case & Print It In Another Case.
23. C Program To Print Natural Number From 1 To 10 By Using While Loop.
24. C Program To Find Area & Circumference Of A Circle.
25. C Program To Find The Area Of A Rectangle (Using Functions).



26. C Program To Find Factorial Of A Number.
27. C Program To Print Fibonacci Series Upto 100.
28. C Program To Calculate Simple Interest.
29. C Program To Check Whether A Number Is Prime Or Not.
30. C Program To Print Prime Numbers Between 1 To 100.


31. C Program To Print A Semicolon Without Using A Semicolon.
32. C Program To Display Function Without Using The Main Function.
33. C Program To Print Any Print Statement Without Using Semicolon.
34. C Program To Display Its Own Source Code As Its Output.
35. C Program To Get IP Address.


36. C program To Accept An Integer & Reverse It.
37. C Program To Convert Given Number Of Days To A Measure Of Time Given In Years, Weeks & Days.



38. C Program To Check Whether A Number Is Even Or Not.
39. C Program To Find Greatest Among Three Numbers.
40. C Program To Compute The Reverse Of A Number.


41. C Program To Convert Degree Celsius Temperature To Fahrenheit.
42. C Program To Accept Floating Point Numbers & Print Average.

43. C Program To Find The Area Of A Triangle.
44. C Program To Sort A Given Set Of Numbers In Ascending Numbers.
45. C Program To Specify Size Of Commonly Used Data Types.


46. C Program To Accept Input & Multiply Two Numbers.
47. C Program To Count The Number Of Times A Digit Occurs In A Number Array.

48. C Program To Find The Roots Of A Quadratic Equation.
49. C Program To Count The Number Of Times The Largest Digit Occurs In A Number.
50. C Program To Print Number Of Vowels, Consonants, Characters, Words & Spaces In A Line Of Text.



51. C Program To Check Whether A Number Is Armstrong Or Not.
52. C Program To Display The Days In A Week (Using Switch...Case Statement).
53. C Program To Find The Square Of A Number (Using Functions).

54. C Program To Find Gross Salary.
55. C Program To Check Whether A Year Is A Leap Year Or Not.



56. C Program To Add Complex Numbers.
57. C Program To Display A Sequence Using Stars.
58. C Program To Print A Star Pyramid.
59. C Program To Print Floyd’s Triangle.

60. C Program To Illustrate The Concept Of Unions.


61. C Program To Find The Size Of A Union.
62. C Program To Print Numeric Pyramid.
63. C Program To Print Numerical Pyramid.
64. C Program To Print Numerical Diamond.
65. C Program To Print Character Pyramid.

66. C Program To Print Character Diamond.
67. C Program to find biggest of two no by using ternary operator.
68. C Program to find biggest of four nos. by using Ternary Operator.
69. C Program to find smallest of four nos. by using Ternary Operator.
70. C Program to accept a year and check the whether the given year is a leap year or not by using ternary operator.

71. C Program To Accept A Character In Uppercase & Print In Lowercase.
72. C Program For Entering An Array Of Elements.
73. C Program For Deleting An Element From An Array.
74. C Program For Inserting An Element In An Array.
75. C Program To Count Frequency Of Elements In An Array.


76. C Program On Two Dimensional (2-D) Array / Matrix.

77. C Program To Find Transpose a 3 * 2 matrix.
78. C Program To Multiply Two 3 * 3 Matrix.
79. C Program To Add Two 3 * 3 Matrix.
80. C Program To Print Upper Triangle.

81. C Program to accept values into 3 dimensional array and print.
82. C Program to accept two 3 dimensional array and store addition of those into the third 3-D array .
83. C Program To Implement 8 Queens Problem Using Arrays, Pointers & Functions.
84. C Program To Display Array Of Strings.
85. C Program To Count The Number Of Times A Digit Occurs In A Number Array.

86. C Program To Accept A String & Display It.
87. C Program To Find The Length Of A String.
88. C Program To Concatenate Two Strings.
89. C Program To Compare Two Strings.
90. C Program To Swap Two Strings.


91. C Program To Swap Two Strings Using strcpy() Function.
92. C Program To Sort A Given Number Of Strings Using strcmp() Function.
93. C Program To Check Whether A String Is Palindrome Or Not.
94. C Program To Print The Reverse Of A String.
95. C Program To Join Two Strings.


96. C Program To Display Array Of Strings.
97. C Program To Convert String To An Integer Using atoi() Function.
98. C Program To Accept A String & Display In Reverse.
99. C Program To Accept A String & Display Its Alternate Characters.
100. C Program To Accept A String & Display Alternate Characters In Either Case.


101. C Program To Accept A String & Display It's Substring.
102. C Program To Accept A String & Display It's Alternate Characters In Reverse.
103. C Program To Accept Two Strings & Display The Largest String.
104. C Program To Accept A String & Display Vowels.
105. C Program To Accept A String & Display Number Of Vowels.


106. C Program To Accept A String & Display Number Of Each Vowels.
107. C Program To Accept A String & Find Out Whether This Character Is Present In The String.
108. C Program To Find Out The No. Of Times A Character Is Present In The String.



109. C Program To Understand Working Of Address Concept.
110. C Program On Use Of Array & Pointer Concept Together.


111. C Program On Pointers & 2 - Dimensional Array.
112. C Program On Strings Into Array Of Pointers.
113. C Program To Add Two Numbers Using Pointers.
114. C Program To Accept & Add Ten Numbers Using Pointers.
115. C Program To Accept & Add Ten Numbers Using Pointers.


116. C Program To Implement Recursive Algorithm Using Pointers.
117. C Program With Algorithm To Implement Bubble Sort Using Pointers.
118. C Program To Implement Selection Sort Using Pointers, Arrays & Functions.
119. C Program to sort the entered numbers using bubble sort.
120. C Program To Implement Minimum Spanning Tree Using Functions, Pointers & Structures.


121. C Program To Implement 8 Queens Problem Using Arrays, Pointers & Functions.
122. C Program To Implement Quick Sort Using Pointers, Functions & Arrays.
123. C Program To Implement Binary Search Without Using Recursive Function.
124. C Program To Implement Binary Search Using Recursive Function.
125. C Program To Implement Merge Sort Using Divide & Conquer Strategy.


126. C Program To Implement Selection Sort Using Pointers, Arrays & Functions.
127. C Program With Algorithm To Implement Bubble Sort Using Pointers.
128. C Program To Implement Recursive Algorithm Using Pointers.

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