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| ANSI Common Lisp 22 Printer 22.3 Formatted Output 22.3.8 FORMAT Miscellaneous Operations ### 22.3.8.3 Tilde P: Plural If arg is not eql to the integer `1`, a lowercase `s` is printed; if arg is eql to `1`, nothing is printed. If arg is a floating-point `1.0`, the `s` is printed. `~:P` does the same thing, after doing a `~:*` to back up one argument; that is, it prints a lowercase `s` if the previous argument was not `1`. `~@P` prints `y` if the argument is `1`, or `ies` if it is not. `~:@P` does the same thing, but backs up first.
     (format nil "~D tr~:@P/~D win~:P" 7 1)  "7 tries/1 win"
     (format nil "~D tr~:@P/~D win~:P" 1 0)  "1 try/0 wins"
     (format nil "~D tr~:@P/~D win~:P" 1 3)  "1 try/3 wins"

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