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C Programs

Last Updated : 27 Dec, 2025

To learn anything effectively, practicing and solving problems is essential. To help you master C programming, we have compiled over 100 C programming examples across various categories, including basic C programs, Fibonacci series, strings, arrays, base conversions, pattern printing, pointers, and more. These C Examples cover a range of questions, from fundamental concepts to advanced topics, and are frequently asked in C-basedprogramming interviews.

Before you start with these C programs, take a look at our C tutorial to get a good understanding of the basics.

Basic

  1. C Hello World Program
  2. C Program to Print Your Own Name
  3. C Program to Print an Integer Entered By the User
  4. C Program to Add Two Numbers
  5. C Program to Check Whether a Number is Prime or Not
  6. C Program to Multiply two Floating-Point Numbers
  7. C Program to Print the ASCII Value of a Character
  8. C Program to Swap Two Numbers
  9. C Program to Calculate Fahrenheit to Celsius
  10. C Program to Find the Size of int, float, double, and char
  11. C Program to Add Two Complex Numbers
  12. C Program to Print Prime Numbers From 1 to N
  13. C Program to Find Simple Interest
  14. C Program to Find Compound Interest
  15. C Program for Area And Perimeter Of Rectangle

Control Flow

  1. C Program to Check Whether a Number is Positive, Negative, or Zero
  2. C Program to Check Whether Number is Even or Odd
  3. C Program to Check Whether a Character is Vowel or Consonant
  4. C Program to Find Largest Number Among Three Numbers
  5. C Program to Calculate Sum of Natural Numbers
  6. C Program to Print Alphabets From A to Z Using Loop
  7. C Program to Check Leap Year
  8. C Program to Find Factorial of a Number
  9. C Program to Make a Simple Calculator 
  10. C Program to Generate Multiplication Table
  11. C Program to Print Fibonacci Series
  12. C Program to Find LCM of Two Numbers
  13. C Program to Check Armstrong Number
  14. C Program to Display Armstrong Numbers Between 1 to 1000
  15. C Program to Display Armstrong Number Between Two Intervals
  16. C Program to Reverse a Number
  17. C Program to Check Whether a Number is a Palindrome or Not
  18. C Program to Check Whether a Number is Prime or Not
  19. C Program to Display Prime Numbers Between Intervals
  20. C Program to Check whether the input number is a Neon Number
  21. C Program to Find All Factors of a Natural Number
  22. C program to  Sum of Fibonacci Numbers at Even Indexes up to N Terms

Pattern Printing

  1. C Program to Print Simple Pyramid Pattern 
  2. C Program to Print Given Triangle
  3. C Program to Print 1800 Rotation of Simple Pyramid
  4. C Program to Print Inverted Pyramid
  5. C Program to Print Number Pattern
  6. C Program to Print Character Pattern
  7. C Program to Print Continuous Character Pattern
  8. C Program to Print Hollow Star Pyramid
  9. C Program to Print Inverted Hollow Star pyramid
  10. C Program to Print Hollow Star Pyramid in a Diamond Shape
  11. C Program to Print Full Diamond Shape Pyramid
  12. C Program to Print Pascal's Pattern Triangle Pyramid
  13. C Program to Print Floyd's Pattern Triangle Pyramid
  14. C Program to Print Reverse Floyd pattern Triangle Pyramid

Functions

  1. C Program to Check Prime Number By Creating a Function
  2. C Program to Display Prime Numbers Between Two Intervals Using Functions
  3. C Program to Find All Roots of a Quadratic Equation
  4. C Program to Check Whether a Number can be Express as Sum of Two Prime Numbers
  5. C Program to Find the Sum of Natural Numbers using Recursion
  6. C Program to Calculate the Factorial of a Number Using Recursion 
  7. C Program to Find G.C.D Using Recursion
  8. C Program to Reverse a Stack using Recursion
  9. C Program to Calculate Power Using Recursion

Arrays

  1. C Program to Print a 2D Array
  2. C Program to Find the Largest Element in an Array
  3. C Program to Find the Maximum and Minimum in an Array
  4. C Program to Search an Element in an Array (Binary search)
  5. C Program to Calculate the Average of All the Elements Present in an Array
  6. C Program to Sort an Array using Bubble Sort
  7. C Program to Sort an Array using Merge Sort
  8. C Program to Sort an Array Using Selection Sort 
  9. C Program to Sort an Array Using Insertion Sort
  10. C Program to Sort the Elements of an Array in Descending Order
  11. C Program to Sort the Elements of an Array in Ascending Order 
  12. C Program to Remove Duplicate Elements From a Sorted Array
  13. C Program to Merge Two Arrays
  14. C Program to Remove All Occurrences of an Element in an Array
  15. C Program to Find Common Array Elements 
  16. C Program to Copy All the Elements of One Array to Another Array
  17. C Program For Array Rotation 
  18. C Program to Sort the 2D Array Across Rows
  19. C Program to Check Whether Two Matrices Are Equal or Not
  20. C Program to Find the Transpose
  21. C Program to Find the Determinant of a Matrix
  22. C Program to Find the Normal and Trace
  23. C Program to Add Two Matrices
  24. C Program to Multiply Two Matrices
  25. C Program to Print Boundary Elements of a Matrix
  26. C Program to Rotate Matrix Elements
  27. C Program to Compute the Sum of Diagonals of a Matrix
  28. C Program to Interchange Elements of First and Last in a Matrix Across Rows
  29. C Program to Interchange Elements of First and Last in a Matrix Across Columns

Strings

  1. C Program to Add or Concatenate Two Strings
  2. C Program to Add 2 Binary Strings
  3. C Program to Get a Non-Repeating Character From the Given String
  4. C Program to check if the string is palindrome or not
  5. C Program to Reverse an Array or String
  6. C program to Reverse a String Using Recursion
  7. C Program to Find the Length of a String
  8. C Program to Sort a String
  9. C Program to Check For Pangram String
  10. C Program to Print the First Letter of Each Word
  11. C Program to Determine the Unicode Code Point at a Given Index
  12. C Program to Remove Leading Zeros
  13. C Program to Compare Two Strings
  14. C Program to Compare Two Strings Lexicographically
  15. C Program to Insert a String into Another String
  16. C Program to Split a String into a Number of Sub-Strings

Conversions

  1. C Program For Boolean to String Conversion
  2. C Program For Float to String Conversion
  3. C Program For Double to String Conversion
  4. C Program For String to Long Conversion
  5. C Program For Long to String Conversion
  6. C Program For Int to Char Conversion
  7. C Program For Char to Int Conversion
  8. C Program For Octal to Decimal Conversion
  9. C Program For Decimal to Octal Conversion
  10. C Program For Hexadecimal to Decimal Conversion
  11. C Program For Decimal to Hexadecimal Conversion
  12. C Program For Decimal to Binary Conversion 
  13. C Program For Binary to Decimal Conversion

Pointers

  1. How to Return a Pointer from a Function in C
  2. How to Declare a Two-Dimensional Array of Pointers in C?
  3. C Program to Find the Largest Element in an Array using Pointers
  4. C Program to Swap Two Numbers
  5. C Program to Sort an Array using Pointers
  6. C Program to Sort a 2D Array of Strings
  7. C Program to Check if a String is a Palindrome using Pointers
  8. C Program to Create a Copy of a Singly Linked List using Recursion

Structures and Unions

  1. C Program to Store Information of Students Using Structure
  2. C Program to Store Student Records as Structures and Sort them by Name
  3. C Program to Add N Distances Given in inch-feet System using Structures
  4. C Program to Add Two Complex Numbers by Passing Structure to a Function
  5. C Program to Store Student Records as Structures and Sort them by Age or ID
  6. Read/Write Structure to a File in C 
  7. Flexible Array Members in a Structure in C

File IO

  1. C Program to Create a Temporary File
  2. C Program to Read/Write Structure to a File
  3. C Program to Rename a file
  4. C Program to Make a File Read-Only
  5. C program to Compare Two Files and Report Mismatches
  6. C Program to Copy One File into Another File
  7. C Program to Print all the Patterns that Match Given Pattern From a File
  8. C Program to Append the Content of One Text File to Another
  9. C Program to Read Content From One File and Write it Into Another File
  10. C Program to Read and Print all Files From a Zip File

Date and Time

  1. C Program to Format time in AM-PM format 
  2. C program to Print Digital Clock with the Current Time
  3. C Program to Display Dates of Calendar Year in Different Formats
  4. C Program to Display Current Date and Time
  5. C Program to Maximize Time by Replacing ‘_’ in a Given 24-Hour Format Time
  6. C Program to Convert the Local Time to GMT
  7. C Program to Convert Hours into Minutes and Seconds

More C Programs

  1. C Program to Show Runtime exceptions
  2. C Program to Show Types of errors
  3. C Program to Show Unreachable Code Error
  4. C Program to Find Quotient and Remainder 
  5. C Program to Find the Initials of a Name 
  6. C Program to Draw a Circle in Graphics
  7. Printing Source Code of a C Program Itself
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