Montecarlo: Integrate x from 0 to 1

 #this example integrates x from 0 to 1

#approximation of an integral by average

sum=0

def f(x):

    return x

from random import *

n=int(input('How many random numbers ?'))

for i in range(1,n+1):

      x=random()

      sum=sum+f(x) 

 print('Value of integral =',1/n*sum)

        Output Screen:

   How many random numbers ?10000

Value of integral = 0.4997902939934223