Get Computer Science Programming Basics in Ruby: Exploring PDF

By Ophir Frieder

ISBN-10: 1449355978

ISBN-13: 9781449355975

In case you understand easy high-school math, you could quick study and follow the center recommendations of computing device technology with this concise, hands-on booklet. Led via a group of specialists, you will quick comprehend the adaptation among computing device technology and computing device programming, and you may learn the way algorithms assist you clear up computing difficulties. every one bankruptcy builds on fabric brought previous within the publication, so that you can grasp one middle construction block sooner than relocating directly to the subsequent. you are going to discover basic subject matters comparable to loops, arrays, items, and sessions, utilizing the easy-to-learn Ruby programming language. Then you will placed every little thing jointly within the final bankruptcy by means of programming an easy video game of tic-tac-toe.

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Extra resources for Computer Science Programming Basics in Ruby: Exploring Concepts and Curriculum with Ruby

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Using irb, initialize three variables, x, y, and z, each to some number less than 10. Design an equation with these variables using at least one multiplication, one di‐ vision, and one addition or subtraction element. Have the computer do it once without parentheses, and then add parentheses to the equation and try it again. Are the answers the same? If not, why not? 3. 0. 5, like we saw earlier? 4. Write the expected value of x after both lines are executed. a. irb(main):001:0> x = 9 irb(main):002:0> x = x/2 b.

Programs are not limited to one-directional control flow. In this chapter, we discuss programming constructs that allow us to change program control flow. Understanding this control flow is essential to being able to create and test (debug) an implementation of an algorithm. Figure 4-3. info | 45 Gem of Wisdom An If-Then-Else statement or its equivalent is found in every programming language. 4 If-Then-Else Statements Ruby uses an if statement for basic conditional control flow. The basic form of an if statement is shown in Example 4-3.

Irb(main):001:0> a = 4 => 4 irb(main):002:0> b = 3 => 3 irb(main):003:0> c = 5 => 5 This example creates three variables named a, b, and c and initializes their data to 4, 3, and 5, respectively. While these variables were given simple names, variables can be given almost any name you wish. , x1, x2, zxy). Variable names should explain the data they represent. ) because these char‐ acters often carry specific meaning. Also note that variables cannot begin with integers. Ruby is case-sensitive, so myName is different from myname.

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Computer Science Programming Basics in Ruby: Exploring Concepts and Curriculum with Ruby by Ophir Frieder

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