concat
Summary
Returns value of joined strings without altering original string.
One of multiple ways to do this. Other ways include the addition operator ( + ) and the assignment operator ( += ).
Syntax
"string".concat
Parameters
string1, string2, stringN, etc…
Example
var firstName="Patrick ";
var lastName="Wilson";
var describeThem=" is great";
var actorDescript = firstName.concat(lastName,describeThem);