---
title: nonzeroBitCount
framework: swift
role: symbol
role_heading: Instance Property
path: swift/int/nonzerobitcount
---

# nonzeroBitCount

The number of bits equal to 1 in this value’s binary representation.

## Declaration

```swift
var nonzeroBitCount: Int { get }
```

## Discussion

Discussion For example, in a fixed-width integer type with a bitWidth value of 8, the number 31 has five bits equal to 1. let x: Int8 = 0b0001_1111 // x == 31 // x.nonzeroBitCount == 5

## See Also

### Working with Binary Representation

- [bitWidth](swift/int/bitwidth.md)
- [bitWidth](swift/int/bitwidth-swift.property.md)
- [leadingZeroBitCount](swift/int/leadingzerobitcount.md)
- [trailingZeroBitCount](swift/int/trailingzerobitcount.md)
- [words](swift/int/words-swift.property.md)
- [Int.Words](swift/int/words-swift.struct.md)