X499: Review - Sum 67

[Based on an exercise at https://codeworkout.cs.vt.edu/]

Write a function in Java that takes an int array as its parameter. It should return the sum of the numbers in the array, except ignore sections of numbers starting with a 6 and extending to the next 7 (every 6 will be followed by at least one 7). Return 0 for no numbers.

Examples:

sum67({1,2,2}) -> 5

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