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
Duplicate each element of a vector.
Reverse the elements of an array
convert matrix to single column
Find out total non zero element of matrix
Find out sum of all elements of given Matrix
Create the following sequence : 0 1 1 4 9 25 64 169 ...
Convert a number to its Roman representation
Find the area of the four walls
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