I see a line, "@sorted = sort {$a <=> $b} @array;"

The text book I read says, "When you need to sort data in
numerical order, you have to add an argument to the sort
statement. What confuses me is '$a <=> $b'.
Could you explain what this line do? Can I use '$c <=> $d'
instead?

Thank you

In reply to $a <=> $b by truthseeker66

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