MATHLIB Function

Return the value of the natural logarithm.

LN(X_FV)

X_FV

A positive, non-zero floating point value.

Description

Use this function to return the value of the natural logarithm as a floating point value.

Errors

LN: argument <= 0; returning -1.0.

X was not a positive, non-zero value, so the function returned the value -1.0 and placed this message in the ESL errorlog.