Logo

Programming-Idioms

# 54 Compute sum of integers
Calculate the sum s of the integer list or array x.
New implementation

Be concise.

Be useful.

All contributions dictatorially edited by webmasters to match personal tastes.

Please do not paste any copyright violating material.

Please try to avoid dependencies to third-party libraries and frameworks.

Other implementations 
for E of x loop
   S := S + E;
end loop;
int i,s;
for(i=s=0;i<n;i++)
{
	s+=x[i];
}

int sum = 0;
for (int i = 0; i < n; ++i) {
  sum += x[i];
}
List.fold_left (+) 0 l
(defn sum [x] (reduce + x))

(sum [1 20 300])
;;=> 321
#include <ranges>
auto s = std::ranges::fold_left(x, 0, std::plus<int>{});

#include <functional>
#include <numeric>
int s = std::accumulate(x.begin(), x.end(), 0, std::plus<int>());
using System.Collections.Generic;
using System.Linq;
var s = x.Sum();
import std.algorithm.iteration;
auto s = x.sum();
var s = x.fold(0, (a, b) => a + b);
s = Enum.sum(x)
S = lists:sum(X).
   s = sum(x)
s := 0
for _, v := range x {
	s += v
}
s = sum x
var s = x.reduce((a, b) => a + b, 0);
var s = x.reduce((a, b) => a + b)
int s = 0;
for (int i : x) {
  s += i;
}
import static java.lang.String.valueOf;
import java.math.BigInteger;
BigInteger s = new BigInteger(valueOf(x[0]));
for (int i = 1, n = x.length; i < n; ++i)
    s = s.add(new BigInteger(valueOf(x[i])));
import static java.util.Arrays.stream;
import java.math.BigInteger;
BigInteger s = stream(x)
    .mapToObj(String::valueOf)
    .map(BigInteger::new)
    .reduce(BigInteger::add)
    .get();
int i = 1, n = x.length, s = x[0];
while (i < n) s = s + x[i++];
import static java.util.stream.IntStream.of;
int s = of(x).sum();
val numbers = listOf(1, 2, 3, 4)
val sum = numbers.sum()
(reduce #'+ x)
s = 0
for i,v in ipairs(x) do
   s = s + v
end
@import Foundation;
id s=[x valueForKeyPath:@"@sum.self"];
$s = array_sum($x);
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;
use List::Util 'sum';
$s = sum(@x);
s = sum(x)
s = x.reduce(:+)
s = x.sum
x.iter().sum()
let s = x.iter().sum::<i32>();
val s = x.sum()
(define s (fold-right + 0 x))
(define s (apply + x))
(define s (apply fx+ x))
(define s (apply + x))
(define s (foldr + 0 x))
s := x sum.
Dim s As Integer = x.Sum()

Preview