1.11. Operators and Precedence Perl operators have the following associativity and precedence, listed from highest precedence to lowest. Table cells indicate groups of operators of equal precedence.
Assoc. Operators Description right terms and list operators See next page. left -> Infix dereference operator. none ++ Auto-increment (magical on strings). -- Auto-decrement. right ** Exponentiation. right \ Reference to an object (unary). right ! ~ Unary logical NOT, bitwise NOT. right + - Unary plus, minus. left =~ Binds a scalar expression to a pattern match. left !~ Same, but negates the result. left * / % x Multiplication, division, modulo, repetition. left + - . Addition, subtraction, concatenation. left >> << Bitwise shift right, bitwise shift left. right named unary operators E.g., sin , chdir , -f, -M . none < > <= >=
lt gt le ge Numerical relational operators.
String relational operators. none == != <=>
eq ne cmp
~~ Numerical equal, not equal, compare.
Stringwise equal, not equal, compare.
Smartmatch. left & Bitwise AND. left | ^ Bitwise OR, bitwise XOR. left && Logical AND. left || // Logical OR, defined OR. none .. Range operator. ... Alternative range operator. right ?: Ternary if ? then : else operator. right = += -= etc.Assignment operators. left , Comma operator, also list element separator. left => Same, enforces the left operand to be a string. right list operators (rightward) See below. right not Low precedence logical NOT. left and Low precedence logical AND. left or Low precedence logical OR. left xor Low precedence logical XOR.
You are currently reading a PREVIEW of this book.
Get instant access to over
$1 million worth of books and videos.
Start a Free Trial