Showing Revision 5 created 05/24/2016 by Udacity Robot.

1. Title:
   strings - Intro to Java Programming
2. Description:

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   Here are the answers that I got. The length method returns the number of
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   individual characters in the string. There were 7. The substring method
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   extracts a substring that sits inside the bigger string. In our case, it
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   extracted this string. Whenever you want to extract substrings, you have to
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   understand how the positions in a string are numbered. In Java the initial
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   position is 0, that may sound strange but it's actually pretty useful, and then
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   it goes from there. The string has length 7 and the position's in it are 0, 1,
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    2, 3, 4, 5, 6. That's 7 position's. Now in the substring here you see this 3
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    here. That is the position of the first character that we want to include in
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    the substring. The seven here is the first position that we don't want to have
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    anymore. We don't want position seven. In fact, there is no position seven. We
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    want the ones from three to six. That sounds a bit odd to most people when they
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    see it the first time. But there is an advantage. When you subtract these two
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    numbers, 7 minus 3, that's 4, and that's the length of the substring that
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    you're extracting. The next method here, the indexOf method finds the position
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    of a given character. So, over here I want to know where does the C occur for
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    the first time. And it will go through and say, that's at position three. And
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    finally, you already seen this plus operator in lesson two. It takes two
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    strings and glues them together or as we like to say in programming is, it
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    concatenates them. So, here is the concatenation of Hello and Udacity, notice
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    there's no space in between because there was no space in either this or that
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    string. If you wanted a space, you'd have to add a space. Strings are really
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    useful when you work with text. Sarah has a couple of nifty exercises prepared
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    for you when you get to work with a rather long text and take it apart. And put
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    pieces back together by using some of the string methods that you've seen here.
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    Enjoy.