Typo fixes and improving explanation (#25424)

*Spelling Hello, World! consistently everywhere. 
*Improved explanation and some typo fixes.

guide/english/c/hello-world/index.md

@@ -22,20 +22,16 @@ To write on console you can use the function `printf()` contained in the library
  ```
  
   ## Explanation 
-  
- * The `#include <stdio.h>` is a preprocessor command. This command tells compiler to include the contents of `stdio.h` (standard input and output) header file in the program.
- * The `stdio.h` file contains functions such as `scanf()` and `printf()` to take input and display output respectively.
- * If you use `printf()` function without writing `#include <stdio.h>`, the program will not be compiled.
- * Two backslash characters (//) are used to _comment_ the code, for better understandability. Anything after // on a line is ignored while compiling the program.
- * The execution of a C program starts from the `main()` function.
- * The `printf()` is a library function to send formatted output to the screen. In this program, the `printf()` displays `Hello World!` text on the screen.
- * The `\n` in `printf` creates a new line for the forthcoming text. 
- * The `return 0;` statement is the "Exit status" of the program. In simple terms, program ends with this statement
-
+ * The #include <stdio.h> is a preprocessor command. This command tells compiler to include the contents of stdio.h (standard input and        output) file in the program.
+ * The stdio.h file contains functions such as scanf() and print() to take input and display output respectively.
+ * If you use printf() function without writing #include <stdio.h>, the compiler will generate an error during compilation of the program.
+ * The execution of a C program starts from the main() function.
+ * The printf() is a library function to send formatted output to the screen. In this program, the printf() function displays "Hello, World!" text on the screen.
+ * The return 0; statement is the "Exit status" of the program. In simple terms, program ends with this statement.
 
  ## Output:
  ```
- Hello World!
+ >Hello, World!
  ```
  
  #### More Information