---
title: A Very Big Sum :: HackerRank Challenges
description: Notes and solutions for Big Sum Hacker Rank Challenge.
---

# A Very Big Sum

- [A Very Big Sum challenge on HackerRank](https://www.hackerrank.com/challenges/a-very-big-sum/problem).

ECMAScript has +0 and -0. Read more:

- [ECMAScript 6 Strict Equality Comparison](https://262.ecma-international.org/6.0/#sec-strict-equality-comparison)
- [ECMASCript 13 Number Type](https://262.ecma-international.org/13.0/#sec-ecmascript-language-types-number-type).
- [ECMAScript 13 Number::equal()](https://262.ecma-international.org/13.0/#sec-numeric-types-number-equal).
- [Are +0 and -0 the same? on StackOverflow](https://stackoverflow.com/questions/7223359/are-0-and-0-the-same).

## TypeScript

The TypeScript version of this challenge sounds very difficult because they mention things like `LONG_INTEGER` and `LONG_INTEGER_ARRAY`, which don't matter for languages like ECMAScript (JavaScript, TypeScript) or other languages that don't bother too much with different numeric types.
It was probably ported from C or C++, or some other language where you can't store a `long int` into an `int` (or other similar situations) without losing precision.

### Test Cases

```{literalinclude} /../src/hackerrank/typescript/1-easy/big-sum/bigSum.test.ts
:language: typescript
```

### v1 Procedural for loop

```{literalinclude} /../src/hackerrank/typescript/1-easy/big-sum/bigSum-v1.ts
:language: typescript
```

### v2 FPish with reduce and inline add function

```{literalinclude} /../src/hackerrank/typescript/1-easy/big-sum/bigSum-v2.ts
:language: typescript
```

### v3 FPish with reduce and helper add function

```{literalinclude} /../src/hackerrank/typescript/1-easy/big-sum/bigSum-v3.ts
:language: typescript
```



### Ramda REPL

- [A Big Sum Ramda REPL](https://ramdajs.com/repl/#?%0Afunction%20f%28acc%2C%20num%29%20%7B%0A%20%20%2F%2F%20acc%20%3D%200%0A%20%20%2F%2F%20num%20%3D%201%0A%20%20%2F%2F%20curTotal%20%3D%201%0A%20%20%0A%20%20%2F%2F%20acc%20%3D%201%0A%20%20%2F%2F%20num%20%3D%202%0A%20%20%2F%2F%20curTotal%20%3D%203%0A%20%20%0A%20%20%2F%2F%20acc%20%3D%203%0A%20%20%2F%2F%20num%20%3D%203%0A%20%20%2F%2F%20curTotal%20%3D%206%0A%20%20const%20curTotal%20%3D%20acc%20%2B%20num%3B%0A%20%20return%20curTotal%3B%0A%20%20%2F%2F%20acc%20%3D%201%0A%20%20%2F%2F%20acc%20%3D%203%0A%20%20%2F%2F%20acc%20%3D%206%0A%7D%0A%0A%5B1%2C%202%2C%203%5D.reduce%28f%2C%20100%29%3B%0A%0Afunction%20myAdd%28x%2C%20y%29%20%7B%0A%20%20return%20x%20%2B%20y%3B%0A%7D%0A%0Aconst%20mySum%20%3D%20reduce%28myAdd%2C%200%29%3B%0A%0AmySum%28%5B1%2C%202%2C%203%5D%29%3B%0A)