Factorial Program in C – Iterative and Recursive with Output

The factorial program in C is one of the most common exercises for learning recursion and loops. The factorial of a non-negative integer n, written n!, is the product of all positive integers from 1 to n. By definition, 0! = 1. This page covers two approaches — iterative and recursive — with compile-verified code, …

Array search program in C

Very often we encounter a situation where we have to search for a given target value in a list of values. Simple value types like integers are stored in arrays. This program demonstrates how to do a search within an array by using a method called linear search. Linear search, also called as ‘Sequential search’ …

C Program to demonstrate the ‘fgets’ function.

Program to demonstrate the ‘fgets’ function. The program will count the number of lines in a file. This is a function of the UNIX command ‘wc’. Read more about C Programming Language . /************************************************************ You can use all the programs on www.c-program-example.com* for personal and learning purposes. For permissions to use the* programs for commercial …

Combinations and Permutations in C (nCr and nPr)

Combinations and permutations in C are computed using two related formulas. A combination C(n, r) counts the number of ways to choose r items from n items where order does not matter. A permutation P(n, r) counts the number of ways to arrange r items chosen from n items where order matters. C(n, r) = …

C Program to check the given number is Armstrong or not?

C Program to check the given number is Armstrong number or not?. Armstrong number is a number that is the sum of its own digits each raised to the power of the number of digits. Example: 153 = 1^3 + 5^3 + 3^3. Read more about C Programming Language . /************************************************************ You can use all …

C Preprocessor Directives – #define, #if, #ifdef, #ifndef with Examples

C preprocessor directives are instructions that run before compilation. The preprocessor reads your source file, processes every line that starts with #, and hands the result to the compiler. Understanding them well means smaller code, safer constants, conditional compilation for different platforms, and header files that include safely more than once. Object-Like Macros — #define …