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$ curl repovive.com/roadmaps/go/strings/strings-index

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$ curl repovive.com/roadmaps/go/strings/strings-index

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strings.Index

Finding positions

Find the position of a substring:

s := "Hello, World!"
i := strings.Index(s, "World")  // 7
j := strings.Index(s, "Foo")    // -1 (not found)

Index returns the byte position of the first occurrence, or $-1$ if not found. Use LastIndex to find the last occurrence. Both are case-sensitive.