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
Compute a dot product of two vectors x and y
Calculate the derivative of a polynomial
Beginner's Problem - Squaring
Produce a sine wave
Find the area of the four walls
Convert a number to its Roman representation
Find the square of the sum of the digits of a number
Find the dimensions of a matrix
Create the following sequence : 0 1 1 4 9 25 64 169 ...
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