Arithmetic Sequence

February 23, 2016

Today’s exercise is an interview question from Amazon:

Determine if a list of integers forms an arithmetic sequence. For instance, the integers 1, 2, 3, 4, 5 form an arithmetic sequence because the differences between them are all the same, but the integers 1, 2, 4,8, 16 do not form an arithmetic sequence because the differences betweent them are not all the same. The input need not be sorted, so the integers 3, 2, 5, 1, 4 also form an arithmetic sequence.

Your task is to write a function that determines if a list of integers forms an arithmetic sequence. When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.

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