perl comparision - ghdrako/doc_snipets GitHub Wiki

Numeric	String	Meaning
==	eq	equal
!=	ne	not equal
<	lt	less than
>	gt	greater than
<=	le	less than or equal
>=	ge	greater than or equal

12.0   == 12    TRUE
"12.0"  == 12    TRUE
"12.0"  eq 12    FALSE
  2     <   3    TRUE
  2    lt   3    TRUE
 12     >   3    TRUE
 12    gt   3    FALSE ! (look out, might not be obvious at first)
"foo"  ==  ""    TRUE  ! (You get warnings if you used the "warnings" pragmata)
"foo"  eq  ""    FALSE
"foo"  == "bar"  TRUE  ! (You get warnings if you used the "warnings" pragmata)
"foo"  eq "bar"  FALSE


"foo"  == "bar" will be TRUE -  both strings start with a letter they will be both converted to 0. 0 == 0 so that's why we get true
"foo"  == "" will be TRUE
"foo"  eq "bar"  FALSE
"foo"  eq "" will be FALSE