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Solution: Check If a String Is a Palindrome

Explore how to create a Ruby method that checks if a string is a palindrome by comparing characters from the start and end of the string. Understand the process of writing concise, reusable code to perform palindrome verification with step-by-step explanation and an alternative approach using Ruby syntax.

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Solution

Ruby 3.1.2
def is_palindrome?(string)
    # i and j intialized to both ends of the string
    i = 0
    j = string.length - 1
    while j > i
        return false if string[i] != string[j]
        i = i + 1
        j = j - 1
    end
    return true
end

Explanation

  • Lines 3–4: We initialize the i and j variables to 0 and ...