\a’ Audible alarm (beep)
’\b’ Backspace
’\e’ Escape
’\f’ Form feed
’\n’ New-line
’\r’ Carriage Return
’\t’ Horizontal tab
’\v’ Vertical tab
’\\’ \ the escape character
’\’’ ’ single quote
’\"’ " double quote
’\% % percent sign

*= v *= e
multiplies v with e
/= v /= e
divides v by e.
%= v %= e
assigns the remainder of the division of v by e to v.
>>= v >>= e
shifts v arithmetically to the right by e bits.
>>>= v >>>= e
shifts v logically to the right by e bits.
<<= v <<= e
shifts v to the left by e bits.
&= v &= e
applies a bitwise “and” to v and e and assigns the result to v.
|= v |= e
applies a bitwise “or” to v and e and assigns the result to v.
^= v ^= e
applies a bitwise “exclusive or” to v and e and assigns the
result to v.
= e1 == e2
results in a logical “true” if e1 is equal to e2.
!= e1 != e2
results in a logical “true” if e1 differs from e2.
Note: the following operators may be “chained”, as in the expression
“e1 <= e2 <= e3”, with the semantics that the result is “1”
if all individual comparisons hold and “0” otherwise.
< e1 < e2
results in a logical “true” if e1 is smaller than e2.