text: ## N
  
  ```
  N(expr)
  ```
  
  > gives the numerical value of `expr`.  
  
  
  ```
  N(expr, precision)
  ```
  
  > evaluates `expr` numerically with a precision of `prec` digits.  
  
  
  **Note**: the upper case identifier `N` is different from the lower case identifier `n`.
   
  ### Examples 
  
  ``` 
  >> N(Pi)
  3.141592653589793
  
  >> N(Pi, 50)
  3.1415926535897932384626433832795028841971693993751
  
  >> N(1/7)
  0.14285714285714285
  
  >> N(1/7, 5)
  1.4285714285714285714e-1
  ```
   
  ### Related terms 
  [EvalF](EvalF.md)
   