Exploring Subroutines in Small Basic Programming

This tutorial introduces subroutines in programming using Small Basic. It explains how subroutines can simplify code by allowing repeated use of code blocks without duplication. The tutorial demonstrates creating a star using subroutines and placing it randomly on the screen. It further explores creating a starfield with multiple colors, showcasing the power of subroutines in managing complex tasks efficiently. The tutorial concludes with a brief introduction to the next topic, selection, where the computer makes decisions.

What is the main advantage of using subroutines in programming?

• They allow for code reuse and simplification.

• They make the code run faster.

• They increase the size of the program.

• They make the code harder to read.

In Small Basic, what must you do after defining a subroutine to make it execute?

• Copy and paste it multiple times.

• Call it by its name with parentheses.

• Save the program.

• Declare it as a variable.

How can you ensure that a turtle does not leave a line when moving to a new position?

• Use the 'turtle.clear()' command.

• Use the 'turtle.penup()' command.

• Use the 'turtle.stop()' command.

• Use the 'turtle.hide()' command.

What is the purpose of using 'math.getrandomnumber()' in the program?

• To determine the size of the stars.

• To generate random colors for the stars.

• To set the speed of the turtle.

• To position stars at random locations.

What is the benefit of creating a 'starfield' subroutine?

• It allows drawing stars in a single color.

• It simplifies drawing multiple stars with different colors.

• It reduces the number of stars drawn.

• It makes the stars move faster.

How can you change the color of stars in the starfield?

• By changing the background color.

• By using 'graphicswindow.pencolor' before calling the subroutine.

• By modifying the loop variable.

• By adjusting the turtle speed.

What should you remember to do when calling a subroutine in Small Basic?

• Use a different programming language.

• Declare it as a global variable.

• Include parentheses after the subroutine name.

• Use a semicolon at the end.

What can you create by experimenting with subroutines and different shapes?

• A static image.

• A single colored star.

• A faster program.

• A multi-colored pattern or starscape.

Why is it important to use parentheses when calling a subroutine?

• To increase the execution speed.

• To indicate it is a subroutine and not a variable.

• To make the code look cleaner.

• To reduce the number of lines in the code.

What is a potential error if you forget to use parentheses when calling a subroutine?

• The stars will not change color.

• The program will run slower.

• The subroutine will be treated as a variable.

• The turtle will not move.