What is a correct syntax to output "Hello World" in C#? code example

Example 1: c hello world

#include <stdio.h>

int main() {
   printf("Hello, world!");
   return 0;
}

Example 2: c print hello world

#include <stdio.h>
int main() {
   // printf() displays the string inside quotation
   printf("Hello, World!");
   return 0;
}

Example 3: hello world program in c

echo "Hello, World"