---
title: squareRoot
framework: charts
role: symbol
role_heading: Type Property
path: charts/scaletype/squareroot
---

# squareRoot

A number scale where each range value y can be expressed as a square root function of the domain value x, with y = a * sqrt(x) + b. This is equivalent to a power scale with exponent 0.5.

## Declaration

```swift
static var squareRoot: ScaleType { get }
```