Skip to main content
Previous section   Next section

LN

Returns the natural logarithm of a number.

Synopsis

LN(number)

Arguments

number An expression that resolves to a positive number.

Description

The LN function returns the natural logarithm of number. The number value must be a non-zero positive number; all other values generate an <ILLEGAL VALUE> error.

The LN function complements the action of the EXP function, which is sometimes referred to as the antilogarithm.

Examples

The following example uses the LN function to calculate the natural logarithm of each of the integers 1 through 10:

FOR x=1 TO 10
PRINT "Natural log of ",x," = ",LN(x)
NEXT
Copy code to clipboard

See Also