log, log10, logn

Gamma: Version 4.0
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# `log`, `log10`, `logn`

`log`, `log10`, `logn` -- calculate logarithms.

## Syntax

    log (number)
    log10 (number)
    logn (base, number)

## Arguments

`number`

  Any numeric value.

`base`

  The logarithmic base.

## Returns

For `log`, the natural logarithm of the argument. For `log10`, the base 10 logarithm of the argument. For `logn`, the logarithm of the number in the given base.

## Description

Non-numeric arguments are treated as zero. Illegal values for the arguments will cause an error.

## Example

        Gamma> log(2);
        0.69314718055994528623
        Gamma> log10(2);
        0.30102999566398119802
        Gamma> logn(8,2);
        2.9999999999999995559
        Gamma>

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