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# XCTAssertEqualWithAccuracy

Asserts that two expressions have the same value within a specified accuracy.

```
#define XCTAssertEqualWithAccuracy(expression1, expression2, accuracy, ...)
```

## Parameters

`expression1`

An expression of C scalar type.

`expression2`

An expression of C scalar type.

`accuracy`

An expression of C scalar type describing the maximum difference between `expression1` and `expression2` for these values to be considered equal.

`…`

An optional description of the failure. A literal <doc://com.apple.documentation/documentation/Foundation/NSString>, optionally with string format specifiers.

## Discussion

Generates a failure when the difference between `expression1` and `expression2` is greater than `accuracy`.

---

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