Perl is an Operator and Context driven language

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"2" . "3"     # "23"
"2" . 3       # "23"
2   . 3       # "23"

"2" + "3"     # 5
"2" + 3       # 5

"abc" . "def"    # "abcdef"
"abc" + "def"    # 0  + 2 warnings about Argument isn't numeric in addition (+)