A programming language for absolute beginners
Write it.
It obeys.
Decree is a language for people who have never written a program.
Download it and start writing right away — in English or Japanese.
Windows, Mac and Linux. No setup, no configuration.
# Your command
say "Hello, world!"
repeat 3
say "Write it. It obeys."
endDecree in 30 seconds
If you can read it, you can roughly tell what it does. That is how Decree is written.
「こんにちは！」と表示
名前 = 「お名前は？」と聞く
「{名前}さん、ようこそ」と表示say "Hello!"
name = ask "What is your name?"
say "Welcome, {name}"Hello!
What is your name?
› Hana
Welcome, Hanai を 1 から 3 まで くりかえす
「{i}回目のバンザイ！」と表示
おわり
「おしまい」と表示for i from 1 to 3
say "Hooray number {i}!"
end
say "The end"Hooray number 1! Hooray number 2! Hooray number 3! The end
点数 = 「何点だった？」と数で聞く
もし 点数 >= 80 なら
「すばらしい！」と表示
そうでなければ
「次はきっと大丈夫」と表示
おわりscore = ask number "Your score?"
if score >= 80
say "Amazing!"
else
say "You will do it next time"
endYour score?
› 92
Amazing!ページ = 「https://example.com」を取ってくる
ページ の 題名 を表示
ページ の 本文 を 「メモ.txt」に保存page = fetch "https://example.com"
say page.title
save page.text to "memo.txt"Example Domain
(memo.txt has been saved)Built so beginners don't get stuck
Nothing to set up
Download, double-click, done. The editor is included, so you write and press ▶ right there.
English or Japanese
say and 「表示」 mean the same thing. You can even mix them in one file, and convert with one button.
Friendly errors
When something goes wrong, Decree tells you where, why, and how to fix it — in plain words, with “did you mean”.
Fetch & save in one line
Grab a web page and save it to a file in just one or two lines. No libraries, no setup.
Stumbled on line 3
3 | say "Hello {nme}"
^^^
There is no name called "nme" yet.
Did you mean: "name" (made on line 1)
Hint: make it first, like "nme = …".
All of these just work
Decree doesn't get angry over small differences.
say "hi"print "hi"say("hi")「hi」と表示「hi」と表示して表示 「hi」
Full-width (＝ １２３) and half-width (= 123) characters are treated the same.
Decree = a royal command
You are the king. The computer obeys.
A decree is a royal command. Write your command, and the computer follows it exactly.
No magic spells — just write what you want done, in everyday words.
Let's get started
Pick your computer.
Now, your first command.
You can also try it right in your browser before installing.