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# numericValue

The numeric value of the scalar.

```
var numericValue: Double? { get }
```

## Discussion

For scalars that represent a numeric value, `numericValue` is the whole
or fractional value. For all other scalars, this property is `nil`.

```
let scalars: [Unicode.Scalar] = ["4", "④", "⅕", "X"]
for scalar in scalars {
    print(scalar, "-->", scalar.properties.numericValue)
}
// 4 --> Optional(4.0)
// ④ --> Optional(4.0)
// ⅕ --> Optional(0.2)
// X --> nil
```

This property corresponds to the “Numeric_Value” property in the 
[Unicode
Standard](http://www.unicode.org/versions/latest/).

---

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