Print a 10 by 10 grid of asterisks

Question

Background

This is a standard textbook example to demonstrate for loops.

This is one of the first programs I learnt when I started learning programming ~10 years ago.

Task

You are to print this exact text:

**********
**********
**********
**********
**********
**********
**********
**********
**********
**********

Specs

You may have extra trailing newlines.
You may have extra trailing spaces (U+0020) at the end of each line, including the extra trailing newlines.

Scoring

This is code-golf. Shortest answer in bytes wins.

@DylanMeeus Since that is to do with the dev tools hiding repeated console outputs, and isn't native to JavaScript consoles as a whole and is not in the JavaScript spec - as well as the fact that feature can be turned off - i think it should be acceptable. Not all browsers will collapse it like that. — James T, Commented Aug 4, 2016 at 12:58
One of the most interesting things about this challange is that depending on your language ********** can be shorter then a loop. Makes me wonder when it's better for a given language to switch between 1 or 2 loops. — dwana, Commented Aug 5, 2016 at 9:14
you say trailing new lines are acceptable. Are leading newlines acceptable too? — Albert Renshaw, Commented Feb 10, 2017 at 2:34

ATaco · Accepted Answer · 2024-11-22 06:38:48Z

1

Joeasus, 11 bytes

GRID 10 '*'

Try It Online!

You don't so much "Write" Joeasus answers as you do find them.

answered Nov 22 at 6:38

ATaco

11.2k28 silver badges78 bronze badges

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Galen Ivanov · Accepted Answer · 2024-11-22 09:12:37Z

1

Red, 26 bytes

loop 10[print '**********]

Try it online!

answered Nov 22 at 9:12

Galen Ivanov

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SQB · Accepted Answer · 2024-11-25 09:03:08Z

Prolog (SWIPl), 63 / 68 bytes (depending on how to count)

-1*_.
A*0:-writeln(*),C is A-1,C*9.
A*B:-write(*),C is B-1,A*C.

Query with

9*9.

Online Example

Try it online, but take note that since writeln/1 has a bug in Swish, causing it to print a new line before as well as after. I've replaced it with write/1,nl/0 which should be (according to documentation) its equivalent. This raised the byte count of the example the bug has been fixed.

On the Byte Count

I'm not sure how to count the query, but if it is to be counted towards the total byte count, it's 5 bytes (including an Enter).

pay · Accepted Answer · 2016-08-04 15:50:27Z

0

C# - 88 bytes

class P{static void Main(){int i=0;while(i++<10)System.Console.Write("**********\n");}}

answered Aug 4, 2016 at 15:50

pay

101

\$\begingroup\$ You can reduce this a bit by using a for look, putting int i inside it for(int i=10;i-->0;) (There is never a reason to use a straight while loop in C# code golf, a for loop is never more expensive) \$\endgroup\$
– VisualMelon
Commented Aug 4, 2016 at 17:24
\$\begingroup\$ I know, but then I would have been copying and pasting an already existing answer. \$\endgroup\$
– pay
Commented Aug 4, 2016 at 17:28

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Community · Accepted Answer · 2020-06-17 09:04:33Z

0

Perl, 24 bytes

print((("*"x10).$/)x10);

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Aug 4, 2016 at 16:31

Dancrumb

1634 bronze badges

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Community · Accepted Answer · 2020-06-17 09:04:33Z

0

Javascript (using external library - Enumerable) (41 bytes)

_.From("**********\n").Cycle(120).Write()

Link to lib: https://github.com/mvegh1/Enumerable/

Code explanation: This runs right in the console. Load the string into the library, which parses it to a char array enumerable. Create a new enumerable from that sequence, which is generated by cycling from start to finish 120 times (because the string length is 12, and we want 10 of them..12*10=120). I.e [1,2,3].Cycle(10) would be 1,2,3,1,2,3,1,2,3,1. Finally, join everything into a string with "" as delimiter

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Aug 4, 2016 at 15:13

applejacks01

1,0677 silver badges8 bronze badges

\$\begingroup\$ OH, .length lied to me ahah...I thought it would count "\" and "n" as separate characters..fixed! \$\endgroup\$
– applejacks01
Commented Aug 4, 2016 at 17:58
\$\begingroup\$ Next time use mothereff.in/byte-counter \$\endgroup\$
– Patrick Roberts
Commented Aug 5, 2016 at 0:01
\$\begingroup\$ @PatrickRoberts Got it, thanks! \$\endgroup\$
– applejacks01
Commented Aug 5, 2016 at 0:07

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anna328p · Accepted Answer · 2016-08-04 18:48:04Z

0

Ruby, 18 bytes

puts (?**10+$/)*10

Alternative version (+3 bytes)

10.times {puts ?**10}

Ungolfed (first version)

puts ('*' * 10 + '\n') * 10

edited Aug 4, 2016 at 18:48

answered Aug 4, 2016 at 16:22

anna328p

6,4142 gold badges32 silver badges63 bronze badges

\$\begingroup\$ Second part of 3aw5TZetdf's Perl tip works in Ruby too. \$\endgroup\$
– manatwork
Commented Aug 4, 2016 at 17:43

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Jojodmo · Accepted Answer · 2016-08-04 19:34:42Z

0

Swift 2, 45 Bytes

func a(){for _ in 0...9{print("**********")}}

answered Aug 4, 2016 at 19:34

Jojodmo

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Travelling Particle · Accepted Answer · 2016-08-04 19:46:25Z

0

Wolfram, 22 bytes

Grid[Table["*",10,10]]

answered Aug 4, 2016 at 19:46

Travelling Particle

1

2

\$\begingroup\$ Welcome to PPCG! I can't test right now, but I don't think this is a full program (it only displays correctly when used in Mathematica's notebook front end, which constitutes a snippet by this community's standards). If you put this in a source file and call it with wolfram -script file.m I don't think it'll print anything. I think the shortest way to get around that would be Print@@@Table["*",10,10]. Still, nice solution! :) \$\endgroup\$
– Martin Ender
Commented Aug 4, 2016 at 20:11
\$\begingroup\$ You are correct. Also, your solution works and is 24 bytes long. \$\endgroup\$
– Travelling Particle
Commented Aug 4, 2016 at 20:29

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cgage1 · Accepted Answer · 2016-08-04 23:50:49Z

0

R

matrix(rep("*",100), nrow = 10)

Probably faster way in R, but fun utilization of matrix

Explanation

rep: repeats first argument as many times as second argument.

matrix: creates matrix from vector (first argument), and nrow is the number rows desired in matrix.

answered Aug 4, 2016 at 23:50

cgage1

1012 bronze badges

1

\$\begingroup\$ Hi, and welcome to PPCG! However, we require all code to be golfed, which this isn't. Please golf it. \$\endgroup\$
– Riker
Commented Aug 5, 2016 at 0:07
1

\$\begingroup\$ To make it print the actual desired output you would need to loop cat over it, one way or another. In addition, because of vector recycling, matrix("*",nr=10,nc=10) or array("*",c(10,10)) would be more concise to get the same matrix as the one you generate. \$\endgroup\$
– plannapus
Commented Aug 5, 2016 at 7:12
\$\begingroup\$ You are right in all regards. This works :for(i in 1:10){for (j in 1:10){cat("*");if(j == 10){cat("\n")}}} \$\endgroup\$
– cgage1
Commented Aug 5, 2016 at 16:54

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svarog · Accepted Answer · 2016-08-05 07:03:19Z

0

Javascript, 45 bytes

for(i=0;i<10;i++) {console.log('**********')}

even better, ES6 Javascript, 38 bytes

console.log('**********\n'.repeat(10))

open console and copy paste to test

edited Aug 5, 2016 at 7:03

answered Aug 5, 2016 at 6:45

svarog

1314 bronze badges

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Community · Accepted Answer · 2020-06-17 09:04:33Z

0

Japt, 10 bytes

'*pA +R pA

Prints * ten times, then \n, then repeat from the beginning ten times.

Demo.

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Aug 5, 2016 at 10:13

nicael

4,81124 silver badges43 bronze badges

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Leaky Nun · Accepted Answer · 2016-08-05 10:31:21Z

0

Arcyóu, 21 bytes

(* "**********\n" 10)

Try it online!

answered Aug 5, 2016 at 10:31

Leaky Nun

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manatwork · Accepted Answer · 2016-08-05 11:05:52Z

0

Gema, 31 characters

\A=@repeat{10;**********\n}@end

Sample run:

bash-4.3$ gema '\A=@repeat{10;**********\n}@end'
**********
**********
**********
**********
**********
**********
**********
**********
**********
**********

edited Aug 5, 2016 at 11:05

answered Aug 5, 2016 at 10:35

manatwork

20.6k5 gold badges51 silver badges81 bronze badges

\$\begingroup\$ Can you provide a link to anywhere? \$\endgroup\$
– Leaky Nun
Commented Aug 5, 2016 at 11:01
\$\begingroup\$ Linkified the title, but I know about no on-line interpreter. :( \$\endgroup\$
– manatwork
Commented Aug 5, 2016 at 11:06

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manatwork · Accepted Answer · 2016-08-05 11:15:32Z

0

Groovy, 23 characters

print(("*"*10+"\n")*10)

Sample run:

bash-4.3$ groovy -e 'print(("*"*10+"\n")*10)'
**********
**********
**********
**********
**********
**********
**********
**********
**********
**********

answered Aug 5, 2016 at 11:15

manatwork

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manatwork · Accepted Answer · 2016-08-05 15:14:13Z

0

Bc, 26 characters

for(;i++<10;)"**********
"

Sample run:

bash-4.3$ bc <<< 'for(;i++<10;)"**********
"'
**********
**********
**********
**********
**********
**********
**********
**********
**********
**********

answered Aug 5, 2016 at 15:14

manatwork

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Richard Hamilton · Accepted Answer · 2016-08-05 16:47:33Z

0

JavaScript (~~115~~ ~~106~~ 81 chars)

o='';
for(i=0;i<10;i++){l='';for(j=0;j<10;j++){l+='*';}o+=l+"\n";}
console.log(o);

edited Aug 5, 2016 at 16:47

answered Aug 5, 2016 at 16:37

Richard Hamilton

1012 bronze badges

\$\begingroup\$ make the program all one line, instead of using "\n", just use a literal newline by hitting enter inside two empty quotes. that should save you 4 bytes. Also, do you need a semicolon after `l+='*'? \$\endgroup\$
– Bald Bantha
Commented Aug 8, 2016 at 1:38

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downrep_nation · Accepted Answer · 2016-08-05 17:49:14Z

0

ListSharp, 73 bytes

[FOREACH NUMB IN 1 TO 10 AS k]
{
STRG p=p+"**********"+<newline>
}
SHOW=p

answered Aug 5, 2016 at 17:49

downrep_nation

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Leaky Nun · Accepted Answer · 2016-08-06 04:04:51Z

0

3var, 27 26 bytes

1 byte thanks to Business Cat

iisiia+<*>aaaF[PPPPPPPPPPO]
aaamaiis*>iiF[PPPPPPPPPPO]

I don't how do nested loops marked by F.

Try it online!

edited Aug 6, 2016 at 4:04

answered Aug 5, 2016 at 10:04

Leaky Nun

50.1k6 gold badges110 silver badges284 bronze badges

\$\begingroup\$ 26 bytes aaamaiis*>iiF[PPPPPPPPPPO] \$\endgroup\$
– Business Cat
Commented Aug 5, 2016 at 20:12
\$\begingroup\$ @BusinessCat Thanks, do you know why this and this produce different results? \$\endgroup\$
– Leaky Nun
Commented Aug 6, 2016 at 4:05
\$\begingroup\$ I don't know. I don't see anything in the docs about needing to put loops on a new line, though they do in their examples. Maybe it's an interpreter error? \$\endgroup\$
– Business Cat
Commented Aug 6, 2016 at 5:03

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Community · Accepted Answer · 2020-06-17 09:04:33Z

0

Mumps, 26 Bytes.

F J=0:1:9 W "**********",!

As loops are fairly efficient (space-wise) in Mumps, I thought I'd see if the loop within a loop was shorter, but it was not; weighing in at 31 bytes:

F I=0:1:9{F J=0:1:9{W "*"} W !}

The braces are allowable loop delimiters in the InterSystems Cache version of Mumps that I use; at times they may save a byte or two golfing, but mostly they're just handy to have nested loops in a one-line routine.

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Aug 8, 2016 at 19:25

zmerch

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Community · Accepted Answer · 2020-06-17 09:04:33Z

0

Befunge '98, 31 bytes

a>:|>1++:9`#@_a,
v*'[^
>,v1
-v>

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Aug 9, 2016 at 16:10

MegaTom

4,2861 gold badge21 silver badges24 bronze badges

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Community · Accepted Answer · 2020-06-17 09:04:33Z

0

Factor, 30

10 [ "**********"print ] times

So verbose...

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Aug 9, 2016 at 21:42

fede s.

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nimi · Accepted Answer · 2016-08-11 22:44:25Z

0

MSM, 19 bytes

.;;.;...;.;;.;..␍**

where ␍ is a newline.

. concatenates the two rightmost characters and ; appends a copy of the rightmost element to the end, so the first commands .;;.;... create one line **********␍ and the next commands ;.;;.;.. make 10 lines out of it.

answered Aug 11, 2016 at 22:44

nimi

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Community · Accepted Answer · 2020-06-17 09:04:33Z

0

Pip, 7 bytes

LtP'*Xt

Straightforward: Loop 10 times. Print string of 10 asterisks each time. Kinda disappointed that the simple way was the shortest...

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Aug 12, 2016 at 21:02

DLosc

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Community · Accepted Answer · 2020-06-17 09:04:33Z

0

Jade & CSS, 41 36 bytes

- for (x=0;x++<10;)
  **********<br>

^{Jade is a HTML pre-processor. I'm unsure if using this is breaking any rule or if I have to include something else in the byte count. This also beats my previous entry of 60 bytes.}

See it on Codepen: http://codepen.io/409/pen/ZOPgdJ

Thanks to Business Cat for saving 5 bytes.

edited Jun 17, 2020 at 9:04

CommunityBot

1

answered Aug 18, 2016 at 12:30

ʰᵈˑ

1,4661 gold badge9 silver badges14 bronze badges

\$\begingroup\$ You can save 1 byte by doing x++<11; instead of x<11;x++. I think you can also omit the var. Also this makes a 10x11 grid, you need to change the 11 to 10. \$\endgroup\$
– Business Cat
Commented Aug 18, 2016 at 12:45
\$\begingroup\$ Hey, thanks for the improvements @BusinessCat \$\endgroup\$
– ʰᵈˑ
Commented Aug 18, 2016 at 13:10

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M. Justin · Accepted Answer · 2016-08-22 07:24:54Z

0

Groovy, 23 characters

10.times{println'*'*10}

edited Aug 22, 2016 at 7:24

answered Aug 22, 2016 at 7:00

M. Justin

2911 silver badge7 bronze badges

\$\begingroup\$ Please use code block markup (indent each line with 4 spaces or enclose it between <pre> and </pre> tags) for your code, so scripts like Code Golf UserScript Enhancement Pack can insert the length beside the code. \$\endgroup\$
– manatwork
Commented Aug 22, 2016 at 7:24
\$\begingroup\$ @manatwork Done. I'm new here; had no idea that was a thing. \$\endgroup\$
– M. Justin
Commented Aug 22, 2016 at 7:26

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f1rstguess · Accepted Answer · 2016-09-01 18:13:57Z

0

Stata, 49 bytes

loc i=1
wh `i'<11 {
di "**********"
loc i=`i'+1
}

Output

**********
**********
**********
**********
**********
**********
**********
**********
**********
**********

answered Sep 1, 2016 at 18:13

f1rstguess

1911 silver badge4 bronze badges

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acrolith · Accepted Answer · 2016-09-06 23:35:06Z

0

ISOLADOS, 131 bytes

ISOLAADOOOOOOOOOOOS ISOLAAAAAAADOS ISOLAADOOOOOOOOOOS ISOLAAADOOOS ISOLAAAAAAAADOS ISOLAADOOOOOOOOOOS ISOLAAADOOOS ISOLAAAAAAAAADOS

ISOLAADOOOOOOOOOOOS    push 11
ISOLAAAAAAADOS         chr(a + 31)
ISOLAADOOOOOOOOOOS     push 10
ISOLAAADOOOS           push a * b
ISOLAAAAAAAADOS        push [a]
ISOLAADOOOOOOOOOOS     push 10
ISOLAAADOOOS           push a * b
ISOLAAAAAAAAADOS       join list by new lines

edited Sep 6, 2016 at 23:35

answered Sep 6, 2016 at 22:59

acrolith

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rnso · Accepted Answer · 2016-09-08 12:41:36Z

0

Racket 36 bytes

(for((j 10))(displayln"**********"))

edited Sep 8, 2016 at 12:41

answered Sep 6, 2016 at 23:10

rnso

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Magic Octopus Urn · Accepted Answer · 2016-09-08 13:41:55Z

0

Groovy 46 Bytes

(1..10).collect{''.center(10,'*')}.join('\n')

https://groovyconsole.appspot.com/script/5102912250314752

answered Sep 8, 2016 at 13:41

Magic Octopus Urn

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Print a 10 by 10 grid of asterisks

Background

Task

Specs

Scoring

419 Answers 419

Joeasus, 11 bytes

Red, 26 bytes

Prolog (SWIPl), 63 / 68 bytes (depending on how to count)

Online Example

On the Byte Count

Perl, 24 bytes

Javascript (using external library - Enumerable) (41 bytes)

Ruby, 18 bytes

Alternative version (+3 bytes)

Ungolfed (first version)

Swift 2, 45 Bytes

Wolfram, 22 bytes

R

Japt, 10 bytes

Arcyóu, 21 bytes

Gema, 31 characters

Groovy, 23 characters

Bc, 26 characters

ListSharp, 73 bytes

3var, 27 26 bytes

Mumps, 26 Bytes.

Befunge '98, 31 bytes

Factor, 30

MSM, 19 bytes

Pip, 7 bytes

Jade & CSS, 41 36 bytes

Groovy, 23 characters

Stata, 49 bytes

ISOLADOS, 131 bytes

Racket 36 bytes

Groovy 46 Bytes

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