Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Challenges

Comments on It's Hip to be Square

Parent

It's Hip to be Square

+10
−0

Challenge

A catalogue type challenge that simply asks: Given an integer n (where n>=0) as input return a truthy value if n is a perfect square or a falsey value if not.


Rules

  • You may take input by any reasonable, convenient means.
  • You need not handle inputs greater than what your chosen language can natively handle nor which would lead to floating point inaccuracies.
  • Output should be one of two consistent truthy/falsey values (e.g., true or false, 1 or 0) - truthy if the input is a perfect square, falsey if it's not.
  • This is code-golf so lowest byte count wins.

Test Cases

Input:  0
Output: true

Input:  1
Output: true

Input:  64
Output: true

Input:  88
Output: false

Input:  2147483647
Output: false
History
Why does this post require attention from curators or moderators?
You might want to add some details to your flag.
Why should this post be closed?

0 comment threads

Post
+1
−0

PHP, 69 37 bytes

<?=($y=sqrt($x=fgets(STDIN)))*$y==$x;

Try it online!

Golfed 32 bytes thanks to @Shaggy's advice.

History
Why does this post require attention from curators or moderators?
You might want to add some details to your flag.

1 comment thread

Does nothing (1 comment)
Does nothing
Shaggy‭ wrote over 3 years ago

This does nothing if the input isn't square. This 44 byte version, though, will output nothing, which is falsey, if the input isn't square. Although, it can be done in at least 26 bytes ;)