String manipulation

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Across
  1. 2. string, Returns only a part of a string, based on position.
  2. 4. Returns the number of characters in a string.
  3. 6. The general data type used to store text.
  4. 7. Converts all letters in a string to small letters.
Down
  1. 1. A string is made up of these smaller units.
  2. 3. Convert all letters in a string to capital letters.
  3. 5. The position number of a character within a string (used in substring).