Ruby Basic Exercises: Check whether the sequence of numbers 10, 20, 30 appears anywhere in a given array of integers

Last update on June 06 2025 12:49:56 (UTC/GMT +8 hours)

Write a Ruby program to check whether the sequence of numbers 10, 20, 30 appears anywhere in a given array of integers.

Ruby Code:

def array102030(nums)
    idx = 0
    while idx < nums.length-2
        if nums[idx..idx+2] == [10,20,30]
            return true
        end
        idx += 1
    end
    return false
end
print array102030([10, 20, 30, 40, 50]),"\n"
print array102030([0, 10, 20, 30, 90]),"\n"
print array102030([10, 20, 50, 30, 70])

Output:

true
true
false

Flowchart:

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