The document provides instructions for writing a C program in Ubuntu, including how to save files with a .c extension, how to include header files containing input/output functions like printf using #include, and how the main() function is executed first and can call functions like printf to output text to the screen by enclosing it in quotation marks and ending statements with semicolons.

1. Writing C program in Ubuntu
Computational Skills Practical
B.E. First Semester Engineering

5. At this point you should save your file as
Eg: filename.c
But we will save it afterwards
only for this example to learn something.

6. #include <stdio.h>
The statement helps C program in
including the header files inside which
there are stand input and output
functions like printing and scanning
are
Example of function to print text on screen
printf(“Hi”);

7. main()
When the program starts execution
main () is the first function which will
be executed.

8. printf(“Hello n”);
• { All functions will start and end the
open & close curly braces.
}
• This line will call a function printf inside
the header file which will help in printing
the data inside double inverted comas
“anything” on the screen.
• n tells the complier to take a new line.
• ; a line in C must end with a semicolon

10. 2
1

13. 1
2