The LN function in Excel is used to calculate the natural logarithm of a given positive number. The natural logarithm is the logarithm to the base ( e ) (where ( e approx 2.71828 ), a mathematical constant). Here’s how you can use the LN function in Excel:
Syntax
LN(number)
- number: This is the positive real number for which you want the natural logarithm. It must be greater than zero.
Steps to Use the LN Function
- Select the Cell: Click on the cell where you want to display the result of the natural logarithm.
- Enter the Formula: Start typing the formula with an equals sign (`=`), followed by `LN`.
For example, to find the natural logarithm of 10, you would enter:
=LN(10)
- Press Enter: After typing the formula, press the `Enter` key. The cell will then display the natural logarithm of the specified number.
Example
If you have a number in cell `A1` and you want to find its natural logarithm, you can use:
=LN(A1)
Note
- The LN function will return a #NUM! error if you try to calculate the natural logarithm of a non-positive number (i.e., zero or a negative number).
- Ensure that the number you’re using with the LN function is always positive to avoid errors.
By using these steps and understanding the syntax of the LN function, you can easily calculate natural logarithms in Excel.
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