Its very easy. Just concatenate two strings.
In the test cases you wrote "your_fcn_name(x)" and not "your_fcn_name(x1,x2)" ;-)
Duplicate of 2081
This user (ALBERT ALEXANDER STONIER) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV
please improve test suite
Swap the first and last columns
Back to basics 11 - Max Integer
Simple equation: Annual salary
Sum the 'edge' values of a matrix
Find the area of the four walls
Create the following sequence : 0 1 1 4 9 25 64 169 ...
Reverse a matrix
Convert a number to its Roman representation
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