In 1970 Dennis Ritchie develop C language at BELL lab (USA),in 1972.
C language is a middle-level programming language because it supports
the feature of both low-level and high-level languages. 
Which is used to create console application. 
It is a case-sensitive language.

Structure of C-language
#include<stdio.h>
int main() {
 
   printf("Hello, World!");
   return 0;
}

#include  -> Library / Header file
Include means we can add the library in top of the file. 
And add the library name in angular bracket like #include<stdio.h>. 
std mean standard, io means input/output and h means header. 
It necessary because without this library we can’t print anything.