This list gives a brief description of the most useful functions to 
  manipulate numbers in Microsoft Access VBA.  
  Note that functions are always followed by a pair of brackets even if - 
  like Rnd() - there's nothing in between them. The Access editor will 
  sometimes remove these brackets but by entering them you are telling 
  Access that you are attempting to use a function.
  
    | Abs(<number>) | Returns the absolute value of <number>. | 
  
    | Cos(<number>) | Returns the cosine of <number> radians. See 
      
        Sin 
      and
      
        Tan | 
  
    | e | Access does not have the value of e built in. Use 
      
        Exp(1) 
      to calculate e raised to the power of 1 or just define
      2.718281828459 as a constant. | 
  
    | Exp(<number>) | Returns 
      
        e^<number>. 
      See 
      
        Log | 
  
    | Fix(<number>) | Returns the whole number between <number> and zero. Identical 
      to 
      
        Int
      for positive numbers. Be careful with negative numbers. | 
  
    | Int(<number>) | Returns the nearest whole number less than <number>. Identical 
      to 
      
        Fix
      for positive numbers. | 
  
    | Log(<number>) | Returns the natural (base 
      
        e) 
      logaritm of <number>. 
      See 
      
        Exp | 
  
    | Pi | Access VBA does not have the value of pi built in. Use 
      3.1415926536 or however many digits you require. | 
  
    | Rnd() | Returns a 
      
        random
      number. Use Randomize() to control the random number generator. | 
  
    | Sgn(<number>) | Returns 1, 0, or -1 when <number> is positive, zero, or 
      negative respectively. | 
  
    | Sin(<number>) | Returns the sine of <number> radians. See 
      
        Cos 
      and
      
        Tan | 
  
    | Sqr(<number>) | Returns the square root of <number>. Generates a runtime error 
      if <number> is negative. | 
  
    | Tan(<number>) | Returns the tangent of <number> radians. Generates a runtime 
      error if <number> is 
      
        Pi/4. 
      See 
      
        Cos 
      and
      
        Tan |