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There are two types of strings defined by a stream of characters surrounded by either single quotes ' or double quotes "
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Single-quoted strings are perhaps the simplest
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Inside such strings ALL characters including newlines are treated literally except that ' must be represented as \' and \ as \\
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In particular, \n does NOT represent a newline
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Example: 'don\'t' is the five character word don't
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As in C, ALL strings are stored as zero-byte terminated byte streams so that
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'' and "" are both stored internally as one byte 00 (octal zero)
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