[Programming Encyclopedia] §2 Try using Ruby

Purpose

Although I was enthusiastic about "Let's learn programming !!" Programming seems to be difficult, I can't read English, I'm not good at PC operation itself, For you who were frustrated a long time ago __ Read this article ・ Just move your PC and you'll see "What! Programming is interesting!" The purpose is to make you think. __

I would like to serialize it under the title of Programming Encyclopedia.

Development environment

• Mac: macOS10.15.7 (main PC)
• Browser: Google Chrome
• Text editor: VSCode (Visual Studio Code)

Ruby program execution

This is a continuation of Last time. Let's run it using Ruby in earnest!

procedure

1. On the desktop, rename "Right click"-> "New folder"-> "sample.rb"
2. Open VsCode and press "⌘ + o" to open "Desktop"-> "sample.rb"
3. Type the following program into VsCode!

sample.rb

puts "Hello World"

Once you've done that, call spotlight with "⌘ + space" and search for "terminal"! Check the following in the terminal.

$ cd desktop　
$ ls #Check the files contained in the desktop.
$ cd sample.rb
$ ruby sample.rb #If the content you typed in Vs Code is reflected here, it will be successful
Hello World

that's all! From here ** puts "Hello World" ** Let's take a look at the contents of.

** puts "Hello World" ** "Hello World" is a character string to be displayed on the PC. The character string is basically enclosed in "" (double quotation marks) or "" (single quotation marks).

** puts "Hello World" ** puts are methods.

What is a method?

A method is a command army that performs processing in programming. By describing the method name in programming, the method processing is executed. There are various method processes, and ten numerical calculations are possible.

What is the puts method?

The puts method used this time is a method that outputs characters to the terminal. Insert a half-width space between puts and the character string.

that's all! This time I just output the character string on the screen, Next time I would like to use operators,

Remarks

─────────────────────────────── ■ Books recommended by the author ───────────────────────────────

"Introduction to Web Technology to Become a Professional"

"How to think about changing jobs"
"High power marketing"
"Courage to be disliked"
"Complete output"

─────────────────────────────── ■ Movies recommended by the author ───────────────────────────────

"My Intern"
"Shin Godzilla"
"Dragon Ball Super Broly"
「School of Roc」