Editing Idiom 54 : Compute sum of integers

Idiom

# 54 Compute sum of integers

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Lead paragraph

Calculate the sum _s of integer list _x.

Implementation

Language

Dart

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Last edited by

Imports

Code

var s = x.fold(0, (a, b) => a + b);

Documentation URL

Original attribution URL

Online demo

Edit summary

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Implementation edit is for fixing errors and enhancing with metadata.

Instead of changing the code of the snippet, consider creating another Dart implementation.

Other implementations

s = sum(x)

s := 0
for _, v := range x {
	s += v
}

Demo

use List::Util 'sum';

$s = sum(@x);

$s = array_sum($x);

x.iter().sum()

Demo
Doc

int i,s;
for(i=s=0;i<n;i++)
{
	s+=x[i];
}

import std.algorithm.iteration;

auto s = x.sum();

var
  _x: Array of integer;
  _s, i: Integer;
begin
  _s := 0;
  //assume _x contains some values
  for i := Low(_x) to High(_x) do _s := _s + _x[i];
end;

s = x.sum

s = Enum.sum(x)

s = sum x

int s = 0;
for (int i : x) {
  s += i;
}

using System.Collections.Generic;
using System.Linq;

var s = x.Sum();

#include <functional>
#include <numeric>

int s = std::accumulate(x.begin(), x.end(), 0, std::plus<int>());

S = lists:sum(X).

s = 0
for i,v in ipairs(x) do
   s = s + v
end

Demo

s = x.reduce(:+)

var s = x.reduce((a, b) => a + b, 0);

Demo
Origin

(define s (foldr + 0 x))

let s = x.iter().sum::<i32>();

Demo
Doc

val s = x.sum()

List.fold_left (+) 0 l

(defn sum [xs] (reduce + xs))

(sum [1 20 300])
;;=> 123

(reduce #'+ x)

   s = sum(x)

var s = x.reduce((a, b) => a + b)

Demo

val numbers = listOf(1, 2, 3, 4)
val sum = numbers.sum()

Dim s As Integer = x.Sum()

int sum = 0;
for (int i = 0; i < n; ++i) {
  sum += x[i];
}

Preview