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Concatenation is a computer programing operation that join strings together..
For example.
The concatenation of "hello" and "world" is "helloworld"
One on the most powerful tools in Excel is the ability to use concatenation.
The ampersand, which is this character: &
yes
There is one concatenation in PHP it is the period ".". So you could do something like:
echo "hello" . " " . "world!";
?>
It would print out hello world!