def pi_ex():
x = math.pi
# assign pi to x
y = (str(x))
# convert pi to a string
print(y)
# print pi as a string
z = (float(x))
# convert pi to an integer
print(z)
# print pi as a string
a = "{0:.0f}" .format(z)
# round integer pi
print(a)
task4.approx_e(z)
print(task4.approx_e(z))
def main():
pi_ex()
task4.approx_e()