In this article , I focus on the more purely mathematical functions provided , such as log10 and cosh .
在本文中，我重点讨论其中的比较单调的数学函数，如log10和cosh。
Math . log10 () has the usual caveats of logarithm functions : taking the log of0 or any negative number returns NaN .
log10（）能正常终止对数函数执行：0或任何负数的对数返回NaN。
log10