hyphen vs minus in regex

[mm]

In a regular expression,
is a hyphen simply -
whereas a minus sign is \-
I am trying to understand the code below:

$addend_two = (rand 200) - 100;

$addend_two =~ /(\-?[\d]+)\.?[\d]*/ ? $intPart2 = $1 : die "No
integral value\n" ;

 

[dw]

In a regular expression,
is a hyphen simply -
whereas a minus sign is \-
I am trying to understand the code below:

$addend_two = (rand 200) - 100;

$addend_two =~ /(\-?[\d]+)\.?[\d]*/ ? $intPart2 = $1 : die "No
integral value\n" ;

a minus and a hyphen are both simply -