0: #!/usr/bin/perl
1: # This is a quick program to calculate pi using the Monte Carlo method.
2: # I recomend inputting  a value for $cycles greater that 1000. 
3: # I am working on a detailed explanation of how and why this works. 
4: # I will add it as soon as I'm done.
5: use strict;
6: my ($cycles, $i, $yespi, $pi) = 0;
7: srand;
8: #print "Please enter number of cycles\n";
9: print "Please enter the amount of cycles:";
10: chomp($cycles = <STDIN>);
11: while ($i < $cycles) {
12:     my ($x, $y, $cdnt) = 0;
13:     $x = rand;
14:     $y = rand;
15:     $cdnt = $x**2 + $y**2;
16:     if ($cdnt <= 1) {
17: 	++$yespi;
18: }    
19: ++$i;
20: }
21: $pi = ($yespi / $cycles) * 4;
22: print "Pi is $pi\n";