Ruby Course – Codemeets– 02

November 26, 2020

Ruby Programming Lesson 2: Today, we will dive deeper into Ruby. In this tutorial, we will focus on Variables, Strings, Numbers, and Operations. By the end, you’ll have a solid understanding of these essential concepts in Ruby programming

Use Variable

Variables are used to store information to be referenced and manipulated in a computer program. They also provide a way of labeling data with a descriptive name, so our programs can be understood more clearly by the reader and ourselves. It is helpful to think of variables as containers that hold information. Their sole purpose is to label and store data in memory. This data can then be used throughout your program.launchschool.com

Now you know what is variable, let’s use it Ruby Programming

character_name = "jenny"
character_age = "23"
puts "my name is "+ character_name
puts "my age is "+ character_age

This Code output is My Name is jenny my age is 23. you can try this code in your pc.

Working with Strings Ruby Programming

In Ruby, strings are typically arranged in alphabetical order. Below is a table demonstrating how strings work in Ruby. You can use this to get a better understanding of how string manipulation and ordering function in Ruby.

Phone = "Apple Iphone"

Code	Output
puts Phone.upcase	APPLE IPHONE
puts Phone.downcase	apple iphone
puts Phone.strip	Apple Iphone
puts Phone.length	12
puts Phone.include?"Apple"	true
puts Phone.include?"cake"	false
puts Phone.[3,5]	le Ip
puts "hp".upcase()	HP

Work with Strings

Working With Numbers

Every programming language uses numbers to manage and manipulate data effectively. In Ruby, working with numbers is straightforward. Let me show you how to handle numbers in Ruby.

Syntax	Code
puts -5.43215	-5.43215
puts 5+9	14
puts 5/9	0
puts 2*3	6
puts 2**3	8
puts 10%3	1
puts 5-2	3

Operations & Math in Ruby Programming

In mathematics, we use various operations such as finding the maximum value, calculating square roots, and more. These operations are also implemented in programming but in slightly different ways. The following example will give you a deeper understanding of how to perform such operations in Ruby.

Operations

num = 30.67

Code	Output
puts num.abs()	30.67
puts num.round()	30
puts num.ceil()	31
puts num.floor()	30

Operations

Math

it is a hard mathematics part but using ruby we can do it easy. see below table.

Syntax	Output
puts Math.sqrt (2)	1.4142135623730951
puts Math.log (2)	0.6931471805599453

Math

Now you have developed some knowledge about Ruby. Try typing this code on your computer as well. Practice

Output

Thank for all!

More Ruby ClickHere!

See you Next Ruby Lesson Soon!