Returns the logarithm of an expression to a specified base.
Log ( numeric_value_expression [,base] )
numeric_value_expression | A numeric value or an expression that returns a numeric value. |
base | Optional. A number representing the base to use for the logarithm. If less than zero, zero, or close to 1, the Log function returns #MISSING. If omitted, the Log function calculates the base-10 logarithm. Log (Sales, 10) is equivalent to Log(Sales), and is also equivalent to Log10(Sales). |
Log(9,3)
returns 2
.
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