Hello world in C
Hello friends , this is our first program in c i.e displaying hello world in C. The code for displaying hello world is given below you can copy it by clicking copy button and paste it is codeblock ( Desktop ) or mobile C . Then click on build and run from codeblock menu after that it will run and show an output " hello world " .
Explanation of code
First line #include<stdio.h> includes standard input output header file , what is headerfile ? we will learn it later but for now i want to tell you stdio.h contains functions for taking input or writing output on screen like printf(), scanf().
Second line int main(){ is starting of main function , main function is function which runs first on c file , every c file must contain one and only main function strictly. where main is function name and int is return type , we will learn about return type in function chapter.
Thirdly printf("Hello world"); It displays hello world on computer screen , it is standard output function we will learn about it later.
lastly return 0; it returns 0 to main function , Main function had return type int i.e integer so we returned 0 to tell computer that program has run successfully .