Raises E (2.71828…) to the power v. Use for exponential growth models.
pub fn exp(both: single) -> singlepub fn exp(both: float) -> floatpub fn ln(both: single) -> singlepub fn ln(both: float) -> floatpub fn log2(both: single) -> singlepub fn log2(both: float) -> floatpub fn log10(both: single) -> singlepub fn log10(both: float) -> float