An example introduction of linux awk operator

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I. introduction of operators

Operator describes the assignment operator = + =-= * = / =% = ^ = * * = assignment statement logical operator | | logical or & & logical and regular operator ~! Match regular expression and mismatch regular expression relational operator

=! = Relational operator +-add, subtract * / & multiply, divide and find remainder + -! Unary addition, subtraction and logic is not ^ * exponentiation + +-- increase or decrease, as a prefix or suffix other operator $field references the space string hyphen?: C conditional expression in array whether there is a key value

Description: awk operator is basically the same as c language. The expressions and functions are basically the same.

II. Introduction of examples

Awk assignment operator

The code is as follows:

Equivalent to: aura 5; others of the same kind

Awk logical operator

The code is as follows:

[chengmo@localhost ~] $awk 'BEGIN {a print 1 & & b5 | | b = 9) {print "print";}}'

[chengmo@localhost ~] $awk 'BEGIN {axi11transferif (a > = 9) {print "ok";}}'

Ok

Awk arithmetic operator

The code is as follows:

Note that all operands are used as arithmetic operators, operands are automatically converted to numeric values, and all non-numeric values become 0.

[chengmo@localhost ~] $awk 'BEGIN {a = "b"; print axioms

0 2

Other operators

The code is as follows:

Operator

[chengmo@localhost ~] $awk 'BEGIN {a = "b"; print asides = "b"? "ok": "err";}'

Ok

In operator

[chengmo@localhost ~] $awk 'BEGIN {a = "b"; arr [0] = "b"; arr [1] = "c"; print (an in arr);}'

0

[chengmo@localhost ~] $awk 'BEGIN {a = "b"; arr [0] = "b"; arr ["b"] = "c"; print (an in arr);}'

one

The in operator to determine whether the key exists in the array.

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