This solution is correct to within eps, but the test is expecting exact agreement. That is not good programming when dealing with floating point numbers.
It dseon't mettar waht oedrr the lrettes in a wrod are.
Determine if a Given Number is a Triangle Number
Return 'on' or 'off'
Order of things - 2
A SUBSREF variant that accepts the 'end'-operator.
Create incremental spiral WITHOUT USING EVAL or FEVAL
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