Python String Traversal, For example, you can get a specific character by its index, and also form strings in loops. Learn how to calculate string length, count character frequencies, extract substrings, replace characters, swap characters, and more. You can access the characters one at a time with the bracket operator: >>> fruit = 'banana' >>> letter = fruit[1] The second statement extracts the character at index position 1 from the fruit variable and assigns it to the letter variable. You could use a for loop, range in Python, a slicing operator, and a few more methods to traverse the characters in a string. [Python] — Traversing Strings — Loops are used to work with strings as well as numbers. The expression in brackets is called an index. Often we start at the beginning, select each character in turn, do something to it, and continue until the end. Then traverse from last character of the given string appending each character to the result string. Mar 7, 2026 · Using Backward Traversal – O (n) Time and O (n) Space The idea is to create an empty result string. There are several methods to do this, but we will focus on the most efficient one. ly3, hubhci0xw, gcaur, hzgqi, 2jcxlbyz, tfmf, pcp, hbto3r, dpl, zm1ha,