From: James Edward Gray II <james@...>
Date: 2007-05-02T09:43:36+09:00
Subject: Re: Math Time!

On May 1, 2007, at 7:22 PM, Ari Brown wrote:

> So today I tried to write a program which would print out, say,  
> 1000 digits of pi.

ruby -rbigdecimal -rbigdecimal/math -e 'include BigMath; digits =  
1000; puts "3."+BigDecimal.PI(digits).to_s[3,digits]'

> Ok, so to the point. How do I tell Ruby to print a value (.to_f) to  
> a certain number of integers?

printf "%.20f", flt

> .to_f(1000)? And also, how do I write tan, cos, sin, etc. in Ruby?

Math.tan(num) # etc.

James Edward Gray II