Programming Languages
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Hello World Program in C
Here we
will write two C programs to display Hello World on the screen. In the first
program we are displaying the message using printf function and in the second
program we are calling a user defined function and that function displays the
Hello World message on the screen.
#include
<stdio.h>
int
main()
{
/* printf function displays the content that
is
* passed between the double quotes.
*/
printf("Hello World");
return 0;
}
Output:
Hello
World
1. #include <stdio.h> – This statement tells compiler to
include this stdio.h file in the program. This is a standard input output file
that contains the definitions of common input output functions such as scanf()
and printf(). In the above program we are using printf() function.
2. int main() – Here main() is the function name and int is
the return type of this function. Every C program must have this function
because the execution of program begins with the main() function. The 0 return
value of this function represents successful execution of program while the
return value 1 represents the unsuccessful execution of program. This is the
reason we have return 0; statement at the end of this main function.
3. printf("Hello World"); – This function displays the
content within double quotes as it is on the screen.
4. return 0; – As mentioned above, the value 0
means successful execution of main() function.