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- Teaching beginners to code
- Scratch v1.4
- Scr0130: sequence, selection,
The purpose of this module is to teach you about structured programming; the sequence structure, the selection structure, and the loop structure. The module will also teach you how to write a Scratch program that illustrates the selection structure, mouse events, and Cartesian coordinates.
Table of contents
Preface
This module is one in a collection of modules designed to help beginners
of all ages
(8 and up) learn how to create the code for computer
programs. Information is provided not only for the beginners themselves butalso for their parents and teachers where appropriate.
The purpose of this module is to teach you about structured programming; the sequence structure, the selection structure, and the loop structure.
The module will also teach you how to write a Scratch program that illustrates the selection structure, mouse events, and Cartesian coordinates.
The module also presents a student project by which you can demonstrate your
understanding of the concepts learned by studying the module.
Viewing tip
I recommend that you open another copy of this module in a separate
browser window and use the following links to easily find and view the imageswhile you are reading about them.
Images
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Image 1 . The sequence structure
in pseudocode.
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Image 2 . The selection
structure in pseudocode.
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Image 3 . The loop structure in
pseudocode.
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Image 4 . User interface for the
program named IfSimple01.
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Image 5 . A paraphrased version
of the Scratch code.
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Image 6 . Program code for the
left beach ball
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Image 7 . Initializing the
position and orientation of the basketball.
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Image 8 . All of the code that
applies to the basketball.
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Image 9 . Pseudocode for a
selection structure.
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Image 10 . Two independent
decisions.
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Image 11 . Selection control
structures available in Scratch.
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Image 12 . Programming blocks
belonging to the Sensing group.
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Image 13 . Programming blocks
belonging to the Motion group.
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Image 14 . Initial output from
the program named IfWithVar01.
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Image 15 . Program output after
having clicked twice in the Stage area.
Questions & Answers
Explain the following terms .
(1) Abiotic factors in an ecosystem
Abiotic factors are non living components of ecosystem.These include physical and chemical elements like temperature,light,water,soil,air quality and oxygen etc
Qasim
passive process of transport of low-molecular weight material according to its concentration gradient
AI-Robot
what is production?
Catherine
how did the oxygen help a human being
how did the nutrition help the plants
Biology is a branch of Natural science which deals/About living Organism.
evolutionary history and relationship of an organism or group of organisms
AI-Robot
cell is the smallest unit of the humanity biologically
Abraham
HOW CAN MAN ORGAN FUNCTION
the diagram of the digestive system
allimentary cannel
Ogenrwot
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is respiration
Deborah
Genetics is the study of heredity
Misack
how does twins formed?
Misack
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Source:
OpenStax, Teaching beginners to code. OpenStax CNX. May 27, 2013 Download for free at http://cnx.org/content/col11498/1.20
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