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 log1p returns log(1 + number) computed in a way that is accurate even when the value of number is close to zero. log might only return log(1) in this case due to lack of precision. &reftitle.parameters; number The argument to process &reftitle.returnvalues; log(1 + number) &reftitle.changelog; &Version; &Description; 5.3.0 This function is now available on all platforms &reftitle.seealso; expm1 log log10