JavaScript concat() method

JavaScript's String object uses the concat() method to join pieces of text together; if you pass another data type as argument (like a number), it will be automatically converted to a string: var str = "I learn JavaScript, "; alert( str.concat( "number ", 1, " web scripting language" ) );
Tip: to piece together an array of strings, use the join() method instead.
You can pass one or more arguments, and apply the method on a literal instead of a variable: alert( "I ".concat( "learn ", "JavaScript" ) );
You will generally use the more intuitive "concatenation operator" (the plus sign, but for strings). var str = "I learn "; // Take current value and add something to it: str = str + "JavaScript"; alert( str ); ... or the "concatenation assignment" operator (a plus and equal signs stuck together). var str = "I learn "; str += "JavaScript"; // Same effect as above alert( str );
The PHP equivalent to JavaScript's concat() method is the concatenation operator (dot). $str = 'I ' . 'learn '; // concatenation $str .= 'PHP'; // concatenation-assignment echo $str; // -> 'I learn PHP'
Sister / opposite method: split() separates a string into an array, using the character(s) you pass as argument to break it up (returns single-element array with original string if it can't separate).

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