How to Solve Find the Index of the First Occurrence in a String Problem
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Find the Index of the First Occurrence in a String
Given two strings needle and haystack, return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.
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Understanding the Find the Index of the First Occurrence in a String Problem
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Problem Statement
Given two strings needle and haystack, return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.
Find the Index of the First Occurrence in a String
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Examples
haystack = "sadbutsad", needle = "sad"0"sad" occurs at index 0 and 6. The first occurrence is at index 0, so we return 0.
haystack = "leetcode", needle = "leeto"-1"leeto" did not occur in "leetcode", so we return -1.
Constraints
1 <= haystack.length, needle.length <= 104haystack and needle consist of only lowercase English characters.How Interview Coder Helps with Leetcode Problems
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