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