Introduction to 'C' Language:

  1. 'C' is a programming language used to write the programs and execute them.
  2. 'C' Language is Known as middle level language
  3. 'C' Programming language developed at AT&T's Bell Laboratories in USA in 1972. It was written by Dennis Ritchie.
  4. It is necessary to learn 'C' before learning  C++, java, C#, etc
  5. 'C' language uses compiler. There are so many compiler available for 'C' e.g Borlands Compiler,etc.
  6. Compiler is a translator which used to convert high level language into binary (0's & 1's) language.

Hello World!

            As when learning any new language, the place to start is with the classic "Hello world!" programming.

    #include <stdio.h>
    
    int main()
    {
        printf("Hello, World!\n");
        
        return 0;
    }


Let's break down the code the code to understand each line:

#include <stdio.h> The function used for generating output is defined in stdio.h in order to used the printf function, we need to first include the required file, also called a header file.

int main()  The main() function is the entry point to a program. Curly brackets {}  indicate the beginning and end of a function (also called a code block). The statement inside the brackets determine what the function does when executed.

The printf  function is usedd to generate ouput:

Here, we pass the text "Hello world!" to it.

The \n escape sequence output a newline character. Escape sequences always begin with a backslash "\". The semicolon; indicates the end of the statement. Each statement must end with a semicolon.

return 0; This statement terminates the main() function and return the value 0 to the calling process. The number 0 generally means that our program has successfully executed. any other number indicates that the program has faild.

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