The LOG function returns the logarithm of a given number, using the provided base.
The LOG function takes two arguments, number and base. The value provided for number should be a positive real number. The base argument represents the base of the logarithm. Base is optional and defaults to 10 if not provided.
The logarithm of 16 with base 2 (the power to which 2 must be raised to equal 16) is 4: