请教一下，我今天运行了一个程序，大概是这样：我从数据库中获取一个字段的值，在数据库中我设置提String类型。 但是我计算的时候定义的值是Double类型，比如说数据库的值是Val=0.96, 我获取后，用Double.parse(Val)转换 然后在下面的计算中，m=Math.Round(Math.Log(Val),10 ...

It's a common joke that Python makes a great calculator in its interactive mode. You can make it an even better one with the built-in math module, which contains a lot of the same math functions you ...