Finding the value of Pi using Monte Carlo techniqies

#! /usr/bin/python

import sys
import math
import random

print "The value of pi is:";

num=int(sys.argv[1]);
radius=1.0;
inside=0;

i=0;
while i<num:
    i=i+1;
    x = random.random();
    y = random.random();
    dist = math.sqrt(x*x + y*y);
    if dist<radius:
        inside=inside+1;

pi = 4.0*inside/num;
print pi;