Ruby Online Compiler & Playground
HTML/CSS/JavaScript
HTML
CSS
Javascript
C++
C
PHP
Java
Python
Swift
C#
Ruby
Node.JS
Kotlin
jQuery
Go
R
TypeScript
Start Ruby Course
Register
Challenge OdiousNumber
+21
Author: LukArToDo
Dark
Public
Save
RB
rb
1
2
3
4
5
6
7
8
9
n=
0
for
i
in
1
..
9999
if
i.to_s
(
2
)
.count
(
"1"
)
%2
!=
0
n=n+
1
end
end
puts
(
n
)
Enter to Rename, Shift+Enter to Preview
OUTPUT
