# LOG

The **LOG** function returns the logarithm of a number using a specified base. It calculates the exponent to which the base must be raised to produce the given number. This function is commonly used in mathematical, financial, and scientific calculations involving exponential relationships or scale transformations.

### Syntax

```javascript
LOG(value, base)
```

### Arguments

value - The positive real number for which you want the logarithm (Required).

base - The base of the logarithm (Required).

### Example

```javascript
LOG(COLUMN1, 10)
```

In the example below, the *Log Values* measure is created using the **LOG** function, which returns the logarithm of the values in *MEASURE 3* to the base 10.

<figure><img src="/files/TYum6sCfGIfnd5TiCqOr" alt=""><figcaption><p>Applying LOG Function</p></figcaption></figure>

### Excel equivalent

[LOG](https://support.microsoft.com/en-us/office/log-function-4e82f196-1ca9-4747-8fb0-6c4a3abb3280)


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