v = 3.141
print(v)
v = 3.141e-12
print(v)
v = 03.141e-0012
print(v)

print()
v = -3.
print(v)
v = .001
print(v)
v = 3e2
print(v)
v = 3.000_000_1
print(v)

print()
x = 1.1
y = 2.2
z = x + y
print(z)  # z = 3.3000000000000003 !!!!

print()
v = 3.0e999
print(v)
v = -3.0e999
print(v)
a = 3.0e999 < 12.0
print(a)
a = 3.0e999 > 12.0
print(a)
a = 3.0e999 == 3.0e9999999
print(a)

print()
x = 3.0e999 + 1.5e999999
print(x)
x = 3.0e999 - 1.5e999999
print(x)
x = 3.0e999 * 1.5e999999
print(x)
x = 3.0e999 / 1.5e999999
print(x)