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awk Operators (increasing order of precedence)

= += -= *= /= %=

assignment; v op= expr is v = v op (expr)

||

OR: expr1 || expr2 true if either is; expr2 is not evaluated if expr1 is true

&&

AND: expr1 && expr2 true is both are; expr2 is not evaluated is expr1 is false

!

negate values of express

> >= < <= == != ~ !~

relational operators; ~ and ! are match and non-match

nothing

string concatenation

+ -

plus, minus

* / %

multiply, divide, remainder

++ --

increment, decrement (prefix or postfix)