C'est une tâche simple. Étant donné un nombre réel positif ou négatif, arrondissez-le au prochain entier proche de zéro.

Le défi

• Prenez la saisie sous toute forme raisonnable (stdin, fonction, etc.) d'un nombre réel positif ou négatif.

• Arrondissez ce nombre "vers zéro" - cela signifie que s'il est positif, vous arrondirez vers le bas, et s'il est négatif, vous arrondirez vers le haut.

• Renvoyez le numéro ou envoyez-le à la console.

Cas de test

 1.1   =>  1
-1.1   => -1
 500.4 =>  500
-283.5 => -283
 50    =>  50
-50    => -50

Règles

• Il s'agit de code-golf , donc le plus petit score en octets l'emporte.

• Soyez conscient des échappatoires standard .

S'amuser! _{^{d'autres défis Jimmy à venir}}

Gelée , 1 octet

r

Un programme complet (en tant que lien monadique, il renvoie une liste de longueur un).

Essayez-le en ligne!

Comment?

r - Main Link: number, X           e.g. -7.999
r - inclusive range between left (X) and right (X) (implicit cast to integer of inputs)
  -  = [int(X):int(X)] = [int(X)]       [-7]
  - implicit (smashing) print            -7

Python 3 , 3 octets

int

Essayez-le en ligne!

Tronque les chiffres après la virgule décimale.

REMARQUE: il s'agit d'une réponse triviale. Veuillez consulter les autres réponses avant de voter

Python 2 , 3 octets

int

Essayez-le en ligne!

Perl 5 -p056l15 , 2 octets

<>

Essayez-le en ligne!

Comment ça marche?

-056   # (CLI) Make "." the input record separator
-l15   # (CLI) Make "\n" the output record separator
       # (otherwise it would use the input separator)
-p     # (CLI) Implicitly read $_ from STDIN
<>     # Read the second input field and do nothing with it
-p     # (CLI) Output $_ to STDOUT

Ou si vous préférez une réponse plus traditionnelle:

Perl 5 , 6 octets

$_=int

Essayez-le en ligne!

Labyrinthe et hexagone , 3 octets

Merci à FryAmTheEggman d'avoir souligné que j'avais écrit de l'hexagonie!

?!@

Essayez-le en ligne! & Essayez-le en ligne!

Comment?

Labyrinth et Hexagony vous le diront tous les deux le plus tôt possible! ...

? - read and discard from STDIN until a digit, a - or a + is found. Then read as many characters as possible to form a valid (signed) decimal integer and push its value
! - pop a value and write its decimal representation to STDOUT
@ - exit the labyrinth

brainfuck , 26 octets

,[.+++++[->+++++<]>+[,>]<]

Essayez-le en ligne!

Sorties avec une fin .si le nombre était décimal

Il n'y a pas beaucoup de golf spéculaire, sauf qu'au lieu de soustraire 46 pour vérifier si un personnage est un ., j'ajoute 5 et je multiplie par 5 pour obtenir 255, puis j'en ajoute un de plus pour passer à zéro. Soustraire 3, multiplier par 6 et soustraire 2 équivaut au même nombre

C (tcc), 39 21 10 octets

J'étais en fait assez surpris que personne n'ait pensé à utiliser C.

f(float i){}

Ce n'est pas une fonction identitaire comme cela semble l'être. Le type int implicite de la fonction f ponctue le point flottant.

TIO

Moins susceptible de tromper les gens mais a une longueur d'octet plus courte:

f(int i){}

TIO

J , 6 octets

**<.@|

Essayez-le en ligne!

Signe *multiplié par *l'arrondi <.de la valeur absolue@|

Perl 6 , 4 octets

*+|0

Fonction anonyme.

Essayez-le en ligne!

Java (OpenJDK 8) , 15 octets 9 octets

s->(int)s

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merci à @ kevin-cruijssen

Excel, 10 octets

=TRUNC(A1)

TRUNC tronque un nombre en un entier en supprimant la partie fractionnaire du nombre.

R , 13 5 octets

Merci Robin Ryder

trunc

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Retina 0.8.2 , 5 octets

\..*

Essayez-le en ligne! Le lien inclut des cas de test.

Ruby , 11 octets

proc &:to_i

J'ai choisi celui-ci car il se distingue des lambdas que nous, les golfeurs Ruby, utilisons généralement (heureusement, il avait le même nombre de bytec que la solution "traditionnelle"):

->n{n.to_i}

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ReRegex , 12 octets

\..+//#input

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ReRegex est un langage de programmation qui correspond et remplace encore et encore jusqu'à ce qu'il n'y ait aucune correspondance.

MATCH
    \.                                      The literal period/full stop char
    .+                                      Followed by one or more characters
REPLACE
    (nothing)                               Equivalent to removing the input
STRING TO REPEATEDLY MATCH/REPLACE UNTIL THERE ARE NO MATCHES
    #input                                  The input

JavaScript, 6 octets

x=>x^0

Essayez-le en ligne!

JavaScript, 8 bytes

L'utilisation de intégré est de 2 octets de plus ...

parseInt

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K (oK), 3 bytes

`i$

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Intel 8087 FPU machine code, 14 bytes

D9 2E 010C      FLDCW CW_RNDZ   ; modified CW register for round towards zero
D9 06 010E      FLD  A          ; load single precision value A into ST(0)
DF 16 0112      FIST B          ; store integer value of ST(0) into B

CW_RNDZ   DW    0F7FH           ; control word to round down

Input is single precision value in a memory location A (a DD), output is integer value at memory location B (a DW).

The 8087 must first be put into round towards zero mode by setting the control word (0F7FH). Then load the floating point value and store back to an integer.

Red, 4 bytes

to 1

Try it online!

Just converts the float to an integer (conversion by prototype)

Zsh, 10 bytes

<<<$[0^$1]

xor with 0. I came across this during another challenge recently. Try it online!

Does not work in Bash or POSIX sh (dash).

V (vim), 4 bytes

Á.#D

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Thanks @DJMcMayhem, 1 byte saved.

Keg, 19 17 13 bytes

This outputs some trailing unprintable characters. Also, this exits with an error. (Now we need reversed input!)

?'(:\.>')"([,

Whitespace (with vii5ard compiler), 18 17 bytes

[S S N
_Push_0][S N
S _Duplicate_0][T   N
T   T   _Read_STDIN_as_integer][T   T   T   _Retrieve_input][T  N
S T _Print_as_integer]

Letters S (space), T (tab), and N (new-line) added as highlighting only.
[..._some_action] added as explanation only.

Try it online. You'll have to copy-paste the code yourself (note that SE converts the tabs to a bunch of spaces!) in order to run the code at the online Whitespace-compiler vii5ard. When clicking run, it will ask for an input (i.e. -285.5), and after clicking enter it will continue and output -283.

Explanation in pseudo-code:

Integer i = STDIN as integer
Print i as integer

Whitespace can only use I/O as integers or single characters, so in this case it would read the input as integer and ignore any other trailing characters. I.e. -283.5 or -283abc5 would both be input (and thus output) as -283.

Unfortunately this above doesn't work on TIO for two reasons (all Whitespace compilers are slightly different..):

1. It will give a no parse error when we try to read an input as integer, which isn't an a valid integer. So, instead we'll read one character at a time, and stop (with an error) as soon as we've encountered the . or there is no more input (i.e. 50/-50).
2. In the vii5ard compiler it's also possible to push 0 with just SSN, whereas on TIO it requires an additional S or T: SSSN/SSTN. The first S is Enable Stack Manipulation; the second S is Push what follows as integer; the third S/T is positive/negative respectively; and any S/T after that (followed by an N) is the number we want to push in binary, where S=0 and T=1. For integer 0 this binary part doesn't matter, since it's 0 by default. But on TIO we'd still have to specify the positive/negative, and with most other Whitespace compilers like vii5ard not.

Whitespace (with TIO compiler), 48 bytes

[N
S S N
_Create_Label_LOOP][S S S N
_Push_0][S N
S _Duplicate_0][T   N
T   S _Read_STDIN_as_character][T   T   T   _Retrieve_input][S N
S _Duplicate_input][S S S T S T T   T   S N
_Push_46_.][T   S S T   _Subtract][N
T   S S N
_If_0_Jump_to_Label_EXIT][T N
S S _Print_as_character][N
S N
N
_Jump_to_Label_LOOP]

Letters S (space), T (tab), and N (new-line) added as highlighting only.
[..._some_action] added as explanation only.

Try it online (with raw spaces, tabs and new-lines only).

Explanation in pseudo-code:

Start LOOP:
  Character c = STDIN as character
  If(c == '.'):
    Exit program
  Print c as character
  Go to the next iteration of LOOP

Pip, 5 bytes

a//:1

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C# (Visual C# Interactive Compiler), 9 bytes

n=>(int)n

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Scala, 7 bytes

_.toInt

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05AB1E, 1 byte

ï

In the legacy version (which is written in Python), the cast to integer builtin works as expected to truncate the decimal values.

Try it online.

In the new version of 05AB1E (written in Elixir) it only works on strings (even though integers/decimals/strings should all be interchangeable, unless sorting lexicographical vs numeric for example). Guess I can report a bug to @Adnan..

Try it online to compare integer/decimal input (giving incorrect result) vs string inputs (giving correct results).

Aheui (esotope), 9 bytes

방망희

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Basic idea from that of triangular answer (or any other languages takes numeric input as integer).

Fun fact. 방망희(pronounced bang-mang-heui(a of ark)) sounds almost same as 방망이(pronounced bang-mang-i(a of ark, i sounds like E), which means bat.

How does it works?

방 takes number as integer.

망 prints value as number.

희 terminates program.

PowerShell, 19 bytes

$args-replace'\..*'

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PowerShell by default does bankers' rounding, which is pretty much the opposite of how many other languages do rounding. So, traditionally we'd use [Math]::Truncate() to strip the decimal point and any decimal part and achieve the "to zero" rounding we're interested in here. However, that's a bit long, so using this tip, we can round-toward-zero by implicitly casting the input to a string, performing a regex -replace to get rid of the period and anything after it, and leaving the output on the pipeline for implicit printing.

Triangular, 3 bytes

$.%

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Triangular takes numeric input as an integer; any decimal values are truncated. If it's acceptable to just leave the input on the stack without printing it, then this solution can instead be:

Triangular, 1 byte

$

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