NSString get 100 characters from start

Question

How to get a substring from NSSTring from index 0 to 99. i.e. first 100 characters

Answer 1

[str substringToIndex: 100]

Answer 2

[myString substringToIndex:100]

You need to be sure that index 100 is valid, i.e. length of string is at least 100. Otherwise an exception will be thrown.