# LN

### Definition of LN:

Returns the the logarithm of a number, base e (Euler's number).

### Sample Usage

`LN(100)`

`LN(A2)`

### Syntax

`LN(value)`

`value`

- The value for which to calculate the logarithm, base e.`value`

must be positive.

### Notes

Excellentable does not support complex or imaginary values.

`LN`

is equivalent to`LOG`

given`base`

of e, or`EXP(1)`

### See Also

`SQRTPI`

: Returns the positive square root of the product of Pi and the given positive number.

`SQRT`

: Returns the positive square root of a positive number.

`POWER`

: Returns a number raised to a power.

`LOG10`

: Returns the the logarithm of a number, base 10.

`LOG`

: Returns the the logarithm of a number given a base.

`GAMMALN`

: Returns the the logarithm of a specified Gamma function, base e (Euler's number).

`EXP`

: Returns Euler's number, e (~2.718) raised to a power.

**Step 1. **To use the LN Formula, **start with the Excellentable you would like to edit.**

**Step 2. Then type the LN** **formula into the cell you have chosen to display the outcome:**

**Step 3. Fill in the value.**

### By adding the values you would like to calculate, Excellentable generates the outcome: