CASTI-89 TITANIUM · CALC89
ln(
Returns the natural logarithm of a value, the logarithm to base ℯ.
Syntax
ln(expr)
- Group
- Number functions
- Arguments
- Takes one value or expression.
- Availability
- Included
Example
| Input | Result |
|---|---|
| ln(ℯ) | 1 |
Typing ln(ℯ) on the home screen and pressing ENTER returns 1.
Keystrokes on the TI-89 Titanium
2NDLN
The same key sequence inserts ln( in Calc89, and the AI tutor shows it step by step on the on-screen keypad.
Related commands
- log(Returns the common logarithm of a value, or the logarithm to a given base.
- max(Returns the larger of two values, or the largest element of a list.
- min(Returns the smaller of two values, or the smallest element of a list.
- mod(Returns a modulo b, the remainder of the division with the sign of b.
- real(Returns the real part of a complex number.
- remain(Returns the remainder of a divided by b, with the sign of a.
- root(Returns the n-th root of a value, for example the cube root for n=3.
- round(Rounds a value to a given number of decimal places.