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# wholeNumberValue

The numeric value this character represents, if it represents a whole
number.

```
var wholeNumberValue: Int? { get }
```

## Discussion

If this character does not represent a whole number, or the value is too
large to represent as an `Int`, the value of this property is `nil`.

```
let chars: [Character] = ["4", "④", "万", "a"]
for ch in chars {
    print(ch, "-->", ch.wholeNumberValue)
}
// Prints:
// 4 --> Optional(4)
// ④ --> Optional(4)
// 万 --> Optional(10000)
// a --> nil
```

---

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