C – Program Structure1 min read

Before we start the basic building blocks of the C programming language, we must know the Program Structure of C for the building of programs.

A C program basically consists of the following parts:

  • Preprocessor Commands.
  • Functions.
  • Variables.
  • Statement & Expressions.
  • Comments.

Let see the basic structure below to print Hello World:

Now, let’s know the various parts of the above example:

  1. #include <stdio.h> is a preprocessor command, the first line of the program that adds the stdio.h file before the program compilations.
  2. Next is int main() which is the main function where the program execution begins.
  3. /*...*/ or // is a comment box that will not be executed by the compiler.
  4. printf(...)is a function in C that displays the message “Hello, World!” on the screen. The message needs to be under " ".
  5. return 0; in a program terminates the main() function and returns the value 0.


C Program to search an element in an array using Pointers

A separate function( search_function()) will be created where the array pointer will be declared and the searched element along with the size of an array …

C Program to find the sum of the digits of a number using recursion function

This C program calculates the sum of digits of a given number using recursion. Here’s a concise explanation: Function Definition: sumDigits(int n) This function calculates …

C program to find factorial of a number using Ternary operator with Recursion

Recursion refers to the function calling itself directly or in a cycle. Before we begin, you should have the knowledge of following in C Programming: …

C Program to Add Two Numbers Using Call by Reference

The program takes the two numbers from the user and passes the reference to the function where the sum is calculated. You may go through …

Find the output ab, cd, ef, g for the input a,b,c,d,e,f,g in Javascript and Python

In this tutorial, we will write a program to find a pairs of elements from an array such that for the input [a,b,c,d,e,f,g] we will …

String Pattern Programs in C

In this tutorial, we will write various C pattern programs for String. Before that, you may go through the following topics in C. for loop …