# `GSFontMaster axisExternalValueValueForId:`

*Instance Method*

Returns `0` if no value exists for the given id.

## Declaration

```swift
func axisExternalValueValue(forId ID: String) -> CGFloat
```

```objc
- (CGFloat) axisExternalValueValueForId:(NSString *) ID;
```

```python
axisExternalValueValueForId_(ID: str) -> float
```