387. First unique character in the String | Leetcode problem Tamil Solution
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Explanation:
Loop Through Each Character:
Use a for loop to iterate over the string s character by character.
Check for Uniqueness:
Use s.indexOf(c) to find the first occurrence of the character c.
Use s.lastIndexOf(c) to find the last occurrence of the character c.
If both indices are the same, it means the character is not repeated in the string.
Return the Index:
As soon as a unique character is found, return its index.
Handle the Case When No Unique Character Exists:
If no unique character is found after iterating through the entire string, return -1.
Example Run:
Input: "loveleetcode"
'l': indexOf('l') = 0, lastIndexOf('l') = 0 → Unique, return 0.
Input: "aabb"
No character satisfies the uniqueness condition → Return -1.
This solution is simple, clear, and uses only basic concepts!
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