log1p Returns log(1 + number), computed in a way that is accurate even when the value of number is close to zero &reftitle.description; floatlog1p floatnumber &warn.experimental.func; log1p returns log(1 + number) computed in a way that is accurante even when the value of number is close to zero. log might only return log(1) in this case due to lack of precision. ¬e.no-windows; &reftitle.parameters; number The argument to process &reftitle.returnvalues; log(1 + number) &reftitle.seealso; expm1 log log10