This course helps the learner to learn basic Ruby programming using execution sheets and flow charts.

ruby.tar.gz

ruby

Ruby programming, a sought-after language, is known for its simplicity and readability. This course is designed for beginners and comprehensively introduces Ruby, focusing on mastering fundamental programming concepts through problem-solving techniques.

You will begin with foundational topics like systematic problem-solving and simple program development, then advance to learning decision-making, loops, strings, and arrays in Ruby. You’ll use practical exercises, quizzes, and hands-on coding challenges to strengthen your skills and build a robust understanding of Ruby programming.

After completing this course, you’ll possess valuable, in-demand skills that can significantly boost your career opportunities in the tech industry.

Learn to Code: Ruby for Absolute Beginners

The two-way decision has a true branch and a false branch.


The one-way decision has a true branch and a false branch.


The two-way decision has a branch labeled with `else`.


The one-way decision has a branch labeled with `else`.


**(Select all that apply.)** Which of the following statements are true?


(Select all that apply.) Which of the following statements are true?

Let’s say we have two integers input by the user in the variables `p` and `q`. Which of the following conditional expressions shows that `p` is a _multiple of_ `q`? 

(A number is a multiple of another number if its division gives an integer result.)



Let’s say we have two integers input by the user in the variables <code>p</code> and <code>q</code>. Which of the following conditional expressions shows that <code>p</code> is a multiple of <code>q</code>?
(A number is a multiple of another number if its division gives an integer result.)

**(Select all that apply.)** Let’s say we have an integer input by the user in the variable `num`. Which of the following conditional expressions show whether the integer is an odd number?

The rule is that a natural number not divisible by 2 is an _odd_ number.

(Select all that apply.) Let’s say we have an integer input by the user in the variable <code>num</code>. Which of the following conditional expressions show whether the integer is an odd number?
The rule is that a natural number not divisible by 2 is an odd number.

**(Select all that apply.)** Let’s say we have an integer input by the user in the variable `num`. Which of the following are the correct conditional expressions that show that the integer is a _multiple of $4$_?

(We know that a multiple of $4$ is always an _even_ number.)


(Select all that apply.) Let’s say we have an integer input by the user in the variable <code>num</code>. Which of the following are the correct conditional expressions that show that the integer is a multiple of <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>4</mn></mrow><annotation encoding="application/x-tex">4</annotation></semantics></math>4?
(We know that a multiple of <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>4</mn></mrow><annotation encoding="application/x-tex">4</annotation></semantics></math>4 is always an even number.)

**(Select all that apply.)** Let’s say we have an integer input by the user in the variable `num`. Our program calculates and stores the number of factors of `num` to another variable, `nfact`. Which of the following conditional expressions show that the integer is _not_ a prime number?

The rule is that a number is prime if it is divisible only by itself and by 
$1$.


(Select all that apply.) Let’s say we have an integer input by the user in the variable <code>num</code>. Our program calculates and stores the number of factors of <code>num</code> to another variable, <code>nfact</code>. Which of the following conditional expressions show that the integer is not a prime number?
The rule is that a number is prime if it is divisible only by itself and by
<math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>1</mn></mrow><annotation encoding="application/x-tex">1</annotation></semantics></math>1.

`n % 2 == 1 AND n % 3 == 1 AND n % 4 == 1 AND n % 5 == 1 AND n % 6 == 1 AND n % 7 == 0`


`n % 2 == 1 OR n % 3 == 1 OR n % 4 == 1 OR n % 5 == 1 OR n % 6 == 1 AND n % 7 == 0`

`n % 2 == 1 OR n % 3 == 1 OR n % 4 == 1 OR n % 5 == 1 OR n % 6 == 1 OR n % 7 == 0`

`n % 2 == 1 AND n % 3 == 1 AND n % 4 == 1 AND n % 5 == 1 AND n % 6 == 1 OR n % 7 == 0`

When distributing `n`  number of coins among $2$, $3$, $4$, $5$, or $6$ persons, $1$ coin is left over. But when distributed among $7$ persons, they are distributed equally. Which of the following conditional expressions correctly tests the value of `n`?


When distributing <code>n</code> number of coins among <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>2</mn></mrow><annotation encoding="application/x-tex">2</annotation></semantics></math>2, <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>3</mn></mrow><annotation encoding="application/x-tex">3</annotation></semantics></math>3, <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>4</mn></mrow><annotation encoding="application/x-tex">4</annotation></semantics></math>4, <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>5</mn></mrow><annotation encoding="application/x-tex">5</annotation></semantics></math>5, or <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>6</mn></mrow><annotation encoding="application/x-tex">6</annotation></semantics></math>6 persons, <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>1</mn></mrow><annotation encoding="application/x-tex">1</annotation></semantics></math>1 coin is left over. But when distributed among <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>7</mn></mrow><annotation encoding="application/x-tex">7</annotation></semantics></math>7 persons, they are distributed equally. Which of the following conditional expressions correctly tests the value of <code>n</code>?

Test your knowledge of decisions and branching.

About the Course

Problem Solving with Simple Programs

Decisions and Branching

Ruby Basics

Repetition with Loops

Strings and Arrays

Methods

Appendix - Complex Programs

Wrap Up

Quiz on Decisions and Branching