Python中pow()和math.pow()函数用法示例

> help(pow)
Help on built-in function pow in module __builtin__:
pow(...)
  pow(x, y[, z]) -> number
  With two arguments, equivalent to x**y. With three arguments,
  equivalent to (x**y) % z, but may be more efficient (e.g. for longs).
>
> pow(3,2) # 3**2
9
> pow(3,2,4)# (3**2)%4
1

> import math
> help(math.pow)
Help on built-in function pow in module math:
pow(...)
  pow(x, y)
  Return x**y (x to the power of y).
> math.pow(3,2)
9.0
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