Self Modifying Operators

[% # self-modifying operators a++ ; ++a ; a-- ; --a ; a += 10 a -= 10 a *= 10 a /= 10 a ~= b a &&= c a ||= b a !!= b %] --EOF--
look inside...
Thus Spake Andy:

TT3 has all the self modifying operators so you can now increment a counter without having to write a = a + 1.