Node:Interpolation in Double-quoted Strings,
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Interpolation in Double-quoted Strings
Interpolation is a special process whereby certain special strings
written in ASCII are replaced by something different. In
Single-quoted Strings, we noted that certain sequences in
single-quoted strings (namely, \\ and \') were treated
differently. This is very similar to what happens with interpolation.
For example, in interpolated double-quoted strings, various sequences
preceded by a \ character act different.
Here is a chart of the most common of these:
| String | Interpolated As
| \\ | an actual, single backslash character
| \$ | a single $ character
| \@ | a single @ character
| \t | tab
| \n | newline
| \r | hard return
| \f | form feed
| \b | backspace
| \a | alarm (bell)
| \e | escape
| \033 | character represented by octal value, 033
| \x1b | character represented by hexadecimal value, 1b
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