The answer
Create an empty string, iterate backwards through the original string, and append each character to the new string.
Iterating Backwards: A Common Interview Pattern
How do I reverse a string using a loop?
More FAQs in Iterating Backwards: A Common Interview Pattern
Initialize the counter to the last index (length - 1), set the condition to run while the counter is greater than or equal to 0, and use decrement (i--).
When you delete an element, the elements to its right shift left. If you iterate left-to-right, you skip elements. Iterating backwards avoids this shifting index bug.
No, traversing an array from right to left takes the exact same O(N) time and hardware cycles as traversing it from left to right.
Still have questions?
Browse all our FAQs or reach out to our support team
Want to upskill yourself?
Your learning library
Small steps. Big possibilities.
Find your next course. Build something great.