How “Hello, World!” program works?

• The #include is a preprocessor command that tells the 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 printf() to take input and display output respectively.
• If you use the printf() function without writing #include <stdio.h>, the program will not compile.
• The execution of a C program starts from the main() function.
• printf() is a library function to send formatted output to the screen. In this program, printf() displays Hello, World! text on the screen.
• The return 0; statement is the “Exit status” of the program. In simple terms, the program ends with this statement.

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

Output

Hello World

What is C language is used for?

C language is used to develop system applications that forms major portion of operating systems such as Windows, UNIX and Linux. Operating systems, C compiler and all UNIX application programs are written in C language.

For most people, C++ is the better choice. It has more features, more applications, and for most people, learning C++ is easier. C is still relevant, and learning to program in C can improve how you program in C++. Neither language is a bad choice, and both have realistic career applications.

Is C easy to learn?

C. C is a general-purpose language that most programmers learn before moving on to more complex languages. … It is easy to learn because: A simple syntax with only 32 keywords.