this is a function    ; not really
this is a function    # not really
this is a function   // not really

<!--//#; comment ;#\\--!>

x = 7, y = 9, rule = B3/S01367
3bo$4bo$2o2bo$bo3bo$2bo$3bo2bo$4b2o2$4bo!

i,m,S,n=1,3,[[0]],input()
while i<=n:r=[i%j for j in range(2,m)];b=1-(r in S)&any(r);m+=1-b;S+=b*[r];i+=b
print S[-1]

>>> y += 5
Traceback (most recent call last):
  File "<pyshell#44>", line 1, in <module>
    y += 5
NameError: name 'y' is not defined

>> y += 5
ReferenceError: y is not defined

>>> x += 5; \print(x)
  File "<stdin>", line 1
    x += 5; \print(x)
                    ^
SyntaxError: unexpected character after line continuation character

> v"y"+5V"y"
< null

x = y
y = 2
\print(x) #outputs 2

x = y
x += 5
y = 2
\print(x) #output should be...?

x = y
y = 2
y = 4
\print(x) #outputs 2