Accessing and Modifying String | String Indices
Strings and Characters
A string is a series of characters, such as "hello, world" or "albatross". Swift strings are represented by the String type. The contents of a String can be accessed in various ways, including as a collection of Character values.
String Indices
Each String value has an associated index type, String.
Index, which corresponds to the position of each Character in the string.
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