String Range « String « Ruby

1.enter a string as the argument to []=, and it will return the new, corrected string, if found; nil otherwise.
2.enter a range to indicate a range of characters you want to change. Include the last character with two dots (..)
3.Get substring from a string object
4.Getting the Parts of a String You Want
5.String range with string.length
6.Generating a Succession of Strings
7.Change a string with range