Is it possible to write the C program without header file?

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 C program without header file

    Yes,It is possible because the file name is saved with ".c" extension (ahamad.c) it will be automatically included the header file.        .

         Eg:-     File name is ahamad.c

  

     Sample program:      

                                         main()

                                         {

                                              printf("Welcome to C");

                                          }

              The above program will compile and execute without header file because the file name is ahamad.c but don't forget to save with ".c" extension.