Interview Questions Practicing and solving problems is essential for learning C programming effectively. These examples help build programming skills and prepare for common C programming problems. Includes over 100 C programming examples covering basics, strings, arrays, pointers, conversions, pattern printing, and more. Covers problems from fundamental to advanced concepts, including questions frequently asked in C programming interviews. These basic C programs help beginners understand fundamental concepts such as input, output, variables, arithmetic operations, and basic calculations. Hello World Program Print Your Own Name Print an Integer Entered By the User Add Two Numbers Check Whether a Number is Prime or Not Multiply two Floating-Point Numbers Print the ASCII Value of a Character Swap Two Numbers Calculate Fahrenheit to Celsius Find the Size of int, float, double, and char Add Two Complex Numbers Print Prime Numbers From 1 to N Find Simple Interest Find Compound Interest Area And Perimeter Of Rectangle These C programs cover decision-making and looping concepts such as if-else, switch, for, while, and do-while loops. Check Whether a Number is Positive, Negative, or Zero Check Whether Number is Even or Odd Check Whether a Character is Vowel or Consonant Find Largest Number Among Three Numbers Calculate Sum of Natural Numbers Print Alphabets From A to Z Using Loop Check Leap Year Find Factorial of a Number Make a Simple Calculator Generate Multiplication Table Print Fibonacci Series Find LCM of Two Numbers Check Armstrong Number Display Armstrong Numbers Between 1 to 1000 Display Armstrong Number Between Two Intervals Reverse a Number Check Whether a Number is a Palindrome or Not Check Whether a Number is Prime or Not Display Prime Numbers Between Intervals Check whether the input number is a Neon Number Find All Factors of a Natural Number Sum of Fibonacci Numbers at Even Indexes up to N Terms Pattern Printing These C programs demonstrate how to use nested loops to print different star, number, and character patterns. Print Simple Pyramid Pattern Print Given Triangle Print 180 0 Rotation of Simple Pyramid Print Inverted Pyramid Print Number Pattern Print Character Pattern Print Continuous Character Pattern Print Hollow Star Pyramid Print Inverted Hollow Star pyramid Print Hollow Star Pyramid in a Diamond Shape Print Full Diamond Shape Pyramid Print Pascal's Pattern Triangle Pyramid Print Floyd's Pattern Triangle Pyramid Print Reverse Floyd pattern Triangle Pyramid These C programs demonstrate how to define and use functions, pass arguments, return values, and apply recursion in C. Check Prime Number By Creating a Function Display Prime Numbers Between Two Intervals Using Functions Find All Roots of a Quadratic Equation Check Whether a Number can be Express as Sum of Two Prime Numbers Find the Sum of Natural Numbers using Recursion Calculate the Factorial of a Number Using Recursion Find G.C.D Using Recursion Reverse a Stack using Recursion Calculate Power Using Recursion These C programs cover common operations on one-dimensional and two-dimensional arrays, including searching, sorting, and matrix operations. Print a 2D Array Find the Largest Element in an Array Find the Maximum and Minimum in an Array Search an Element in an Array (Binary search) Calculate the Average of All the Elements Present in an Array Sort an Array using Bubble Sort Sort an Array using Merge Sort Sort an Array Using Selection Sort Sort an Array Using Insertion Sort Sort the Elements of an Array in Descending Order Sort the Elements of an Array in Ascending Order Remove Duplicate Elements From a Sorted Array Merge Two Arrays Remove All Occurrences of an Element in an Array Find Common Array Elements Copy All the Elements of One Array to Another Array Sort the 2D Array Across Rows Check Whether Two Matrices Are Equal or Not Find the Transpose Find the Determinant of a Matrix Find the Normal and Trace Add Two Matrices Multiply Two Matrices Print Boundary Elements of a Matrix Rotate Matrix Elements Compute the Sum of Diagonals of a Matrix Interchange Elements of First and Last in a Matrix Across Rows Interchange Elements of First and Last in a Matrix Across Columns These C programs demonstrate common string operations such as concatenation, comparison, reversal, searching, and manipulation. Add or Concatenate Two Strings Add 2 Binary Strings Get a Non-Repeating Character From the Given String

check if the string is palindrome or not Reverse an Array or String Reverse a String Using Recursion Find the Length of a String Check For Pangram String Print the First Letter of Each Word Determine the Unicode Code Point at a Given Index Remove Leading Zeros Compare Two Strings Compare Two Strings Lexicographically Insert a String into Another String Split a String into a Number of Sub-Strings These C programs cover conversions between different data types and number systems, such as binary, decimal, octal, hexadecimal, and strings. Boolean to String Conversion Float to String Conversion Double to String Conversion String to Long Conversion Long to String Conversion Int to Char Conversion Char to Int Conversion Octal to Decimal Conversion Decimal to Octal Conversion Hexadecimal to Decimal Conversion Decimal to Hexadecimal Conversion Decimal to Binary Conversion Binary to Decimal Conversion These C programs demonstrate the use of pointers for accessing, modifying, and manipulating data stored in memory. How to Return a Pointer from a Function in C How to Declare a Two-Dimensional Array of Pointers in C? Find the Largest Element in an Array using Pointers Swap Two Numbers Sort an Array using Pointers Sort a 2D Array of Strings Check if a String is a Palindrome using Pointers Create a Copy of a Singly Linked List using Recursion Structures and Unions These C programs demonstrate how structures and unions can be used to group and manage different types of related data. Store Information of Students Using Structure Store Student Records as Structures and Sort them by Name Add N Distances Given in inch-feet System using Structures Add Two Complex Numbers by Passing Structure to a Function Store Student Records as Structures and Sort them by Age or ID Read/Write Structure to a File in C Flexible Array Members in a Structure in C These C programs cover file handling operations such as creating, reading, writing, copying, renaming, and comparing files. Create a Temporary File Read/Write Structure to a File Make a File Read-Only Compare Two Files and Report Mismatches Copy One File into Another File Print all the Patterns that Match Given Pattern From a File Append the Content of One Text File to Another Read Content From One File and Write it Into Another File Read and Print all Files From a Zip File These C programs demonstrate how to work with dates and times, including formatting, conversion, and displaying the current date and time. Format time in AM-PM format Print Digital Clock with the Current Time Display Dates of Calendar Year in Different Formats Display Current Date and Time Maximize Time by Replacing ‘_’ in a Given 24-Hour Format Time Convert the Local Time to GMT Convert Hours into Minutes and Seconds More C Programs This section contains additional C programs covering errors, mathematical operations, graphics, source code manipulation, and other useful programming problems. Show Runtime exceptions Show Types of errors Show Unreachable Code Error Find Quotient and Remainder Find the Initials of a Name Draw a Circle in Graphics Printing Source Code of a C Program Itself Introduction 3 min read Identifiers 3 min read Keywords 3 min read Variables 4 min read Data Types 4 min read Operators 8 min read Conditional Statements 4 min read Loops 6 min read Functions 4 min read Arrays 4 min read Strings 5 min read Pointers 7 min read Function Pointer 5 min read Unions 3 min read Enumeration 4 min read Structure Alignment, Padding & Data Packing 5 min read Memory Layout 5 min read Dynamic Memory Allocation 7 min read Memory Leak 3 min read File Handling 11 min read Read/Write Structures 4 min read Error Handling 5 min read Using goto for Exception Handling in C 2 min read File Error Handling 5 min read Variadic Functions 4 min read Signals in C 4 min read Socket Programming 8 min read _Generics Keyword 3 min read Multithreading 4 min read Placement 360 Course 2 min read DSA and System Design Course 2 min read