In C language, print out 'Hello World' without using any header file

Usually, we use header files in C/C language to access built-in functions, such as int, char, and string functions. The function printf() is also a built-in function, which is declared in the "stdio.h" header file and is used to print any type of data on the console.

The following is a sample code for printing in C language without using a header file:

Sample code

int printf(const char *text, ...);
int main() {
   printf( "Hello World" );
   return 0;
}

Output

Hello World

In the above program, we pass Declare the printf() function and print "Hello World" in the program without using any header file. The declaration of the printf() function is as follows

int printf(const char *text, ...);

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