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Perl operator

Arithmetic Perl operators: + (add),-(minus), * (multiply), / (divide), * * (power),% (remainder),-(monocular negative)

(1) the cardinality of power cannot be negative, such as (- 5) * * 2.5#error

(2) the result of power cannot exceed the limit expressed by computer, such as 10**999999#error.

(3) if the Operand of the remainder is not an integer, it is rounded to an integer; the right side of the operator cannot be zero.

(4) monocular negativity can be used as a variable:-$y * is equivalent to $y y *

II. Integer comparison Perl operator

Table3.1. Integer comparison Perl operator

The Perl operator results in:

0-two values are equal

1. The value of music is large.

1-the second value is large

String comparison Perl operator

Table3.2. String comparison Perl operator

Logical Perl operator

Logic or: $a | | $b or $aor$b

Logic and: $a million or $aand$b

Logic is not:! $an or not$a

Logical XOR: $axor$b

Bit operator

Bit and: &

Bit or: |

Bit Fei: ~

Bit XOR: ^

Move to the left: $x2

Note: do not use & for negative integers because Perl will convert them to unsigned numbers.

VI. Assignment operator

Table3.3. Assign Perl operator

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