---
title: "subscript(_:)"
framework: swift
role: symbol
role_heading: Instance Subscript
path: "swift/staticbigint/subscript(_:)"
---

# subscript(_:)

Returns a 32-bit or 64-bit word of this value’s binary representation.

## Declaration

```swift
subscript(wordIndex: Int) -> UInt { get }
```

## Parameters

- `wordIndex`: A nonnegative zero-based offset.

## Overview

Overview The words are ordered from least significant to most significant, with an infinite sign extension. Negative values are in two’s complement. let negative: StaticBigInt = -0x0011223344556677_8899AABBCCDDEEFF negative.signum()  //-> -1 negative.bitWidth  //-> 118 negative[0]        //-> 0x7766554433221101 negative[1]        //-> 0xFFEEDDCCBBAA9988 negative[2]        //-> 0xFFFFFFFFFFFFFFFF

let positive: StaticBigInt =  0x0011223344556677_8899AABBCCDDEEFF positive.signum()  //-> +1 positive.bitWidth  //-> 118 positive[0]        //-> 0x8899AABBCCDDEEFF positive[1]        //-> 0x0011223344556677 positive[2]        //-> 0x0000000000000000