C Foundation

What is C? C Compiler Installation C Extensions C Compiler C Interpreter C Program Structure

C Basics

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Operators

What is Operator C Comma Operator C Arithmetic Operators C Relational Operators C Logical Operators C Bitwise Operators C Conditional Operators C : : Operator C Operator Priority

Basic IO's

Basic IO's C Formatted Functions C Unformatted Functions C Common Functions

Control Statements

What is Control Statement C if Statement C if else Statement C Nested if Statement C Else if Statement C Break Statement C Continue Statement C Switch Statement C Goto Statement

Looping

What is Control Loop C for Loop C Nested for Loop C while Loop C Nested while Loop C do while Loop C Nested do while loop

Functions

What is Function C User Defined Functions C Recursion C Passing Parameters

Scope

Scope C Local Scope C Global Scope

Storage Classes

What is Storage Class C Auto C Extern C Static C Register

Array

What is Array C One Dimensional Array C Two Dimensional Array C Multi Dimensional Array C Arrays Of Strings

String

What is String C String Functions

Pointer

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Structure

What is Structure C Struct within Struct C Array within Structure C Pointer to Structure C Structure and Function C Enum C Bitfield Structure C Type def

Union

What is Union

Files

What is File C read a file C write a file C File Handling C Error Handling C Low Level Disk I/O C Other file functions

Memory Allocation

What is Memory Allocation C Malloc() C Calloc() C Free() C Realloc() C Coreleft()

C Reference

All ASCII Code Basic C Questions

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The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

Recursion in C

What Is Recursion?

Recursion is another technique that you can use if a programmer need to work on a set of values. By conceptual, it's usually easier to use iteration than recursion. However, in certain situations recursion makes more sense. Practically any loop can be converted to use recursion instead, and vice-versa.

How Recursion Related To Function?

In simple terms, recursion occurs when a function calls itself. As one would imagine, such a process would repeat indefinitely if not stopped, thus recursion needs to have some sort of end condition i.e) condition to break recursiion.

C program - Recursion

function1.c
#include <stdio.h>
int rec(int count);     //function declaration
int main()
{
rec(1);
return 0;
}
int rec(int count)
{
if(count > 5)
{
return 0;
}
else
{
printf("\nThis is recursion");
count++;
rec(count);
}
return 0;
}
  • This is recursion
  • This is recursion
  • This is recursion
  • This is recursion
  • This is recursion

Note:

The above program illustrates that the rec() function is called itself in a called function and terminates when the condition is true.

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