added basic Hello World Code in C

Author: iashek

CONTRIBUTORS.md

@@ -439,3 +439,9 @@ Name: [Antonio](https://github.com/toluwalope19) </br>
 Place: Nigeria </br>
 Coding Experience: Python and javaScript. </br>
 Email: [email protected] </br>
+
+Name: [Abhishek Singh](https://github.com/n6wbi6) </br>
+Place: India </br>
+Coding Experience: 2 years of coding experience in C. </br>
+Email: [email protected] </br>
+

c/hello/n6wbi6_hello_world.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main() {
+   
+   printf("Hello, world!");
+   return 0;
+
+}