Longest substring without repeating characters: Given a string

Given a string, print the longest substring without repeating characters . For example, the longest substrings without repeating characters for “ABDEFGABEF” are “BDEFGA” and “DEFGAB”, with length 6. Learn how to find the longest substring without repeating a character in Java. LeetCode Solutions in C++23, Java, Python, MySQL, and TypeScript. Given a string str, find the length of the longest substring without repeating characters . For “ABDEFGABEF”, the longest substring are “BDEFGA” and "DEFGAB", with length 6.