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22.3.11 Examples of FORMAT
(format nil "foo") => "foo"
(setq x 5) => 5
(format nil "The answer is ~D." x) => "The answer is 5."
(format nil "The answer is ~3D." x) => "The answer is 5."
(format nil "The answer is ~3,'0D." x) => "The answer is 005."
(format nil "The answer is ~:D." (expt 47 x))
=> "The answer is 229,345,007."
(setq y "elephant") => "elephant"
(format nil "Look at the ~A!" y) => "Look at the elephant!"
(setq n 3) => 3
(format nil "~D item~:P found." n) => "3 items found."
(format nil "~R dog~:[s are~; is~] here." n (= n 1))
=> "three dogs are here."
(format nil "~R dog~:*~[s are~; is~:;s are~] here." n)
=> "three dogs are here."
(format nil "Here ~[are~;is~:;are~] ~:*~R pupp~:@P." n)
=> "Here are three puppies."
(defun foo (x)
(format nil "~6,2F|~6,2,1,'*F|~6,2,,'?F|~6F|~,2F|~F"
x x x x x x)) => FOO
(foo 3.14159) => " 3.14| 31.42| 3.14|3.1416|3.14|3.14159"
(foo -3.14159) => " -3.14|-31.42| -3.14|-3.142|-3.14|-3.14159"
(foo 100.0) => "100.00|******|100.00| 100.0|100.00|100.0"
(foo 1234.0) => "1234.00|******|??????|1234.0|1234.00|1234.0"
(foo 0.006) => " 0.01| 0.06| 0.01| 0.006|0.01|0.006"
(defun foo (x)
(format nil
"~9,2,1,,'*E|~10,3,2,2,'?,,'$E|~
~9,3,2,-2,'%@E|~9,2E"
x x x x))
(foo 3.14159) => " 3.14E+0| 31.42$-01|+.003E+03| 3.14E+0"
(foo -3.14159) => " -3.14E+0|-31.42$-01|-.003E+03| -3.14E+0"
(foo 1100.0) => " 1.10E+3| 11.00$+02|+.001E+06| 1.10E+3"
(foo 1100.0L0) => " 1.10L+3| 11.00$+02|+.001L+06| 1.10L+3"
(foo 1.1E13) => "*********| 11.00$+12|+.001E+16| 1.10E+13"
(foo 1.1L120) => "*********|??????????|%%%%%%%%%|1.10L+120"
(foo 1.1L1200) => "*********|??????????|%%%%%%%%%|1.10L+1200"
As an example of the effects of varying the scale factor, the code
(dotimes (k 13)
(format t "~%Scale factor ~2D: |~13,6,2,VE|"
(- k 5) (- k 5) 3.14159))
produces the following output:
Scale factor -5: | 0.000003E+06|
Scale factor -4: | 0.000031E+05|
Scale factor -3: | 0.000314E+04|
Scale factor -2: | 0.003142E+03|
Scale factor -1: | 0.031416E+02|
Scale factor 0: | 0.314159E+01|
Scale factor 1: | 3.141590E+00|
Scale factor 2: | 31.41590E-01|
Scale factor 3: | 314.1590E-02|
Scale factor 4: | 3141.590E-03|
Scale factor 5: | 31415.90E-04|
Scale factor 6: | 314159.0E-05|
Scale factor 7: | 3141590.E-06|
(defun foo (x)
(format nil "~9,2,1,,'*G|~9,3,2,3,'?,,'$G|~9,3,2,0,'%G|~9,2G"
x x x x))
(foo 0.0314159) => " 3.14E-2|314.2$-04|0.314E-01| 3.14E-2"
(foo 0.314159) => " 0.31 |0.314 |0.314 | 0.31 "
(foo 3.14159) => " 3.1 | 3.14 | 3.14 | 3.1 "
(foo 31.4159) => " 31. | 31.4 | 31.4 | 31. "
(foo 314.159) => " 3.14E+2| 314. | 314. | 3.14E+2"
(foo 3141.59) => " 3.14E+3|314.2$+01|0.314E+04| 3.14E+3"
(foo 3141.59L0) => " 3.14L+3|314.2$+01|0.314L+04| 3.14L+3"
(foo 3.14E12) => "*********|314.0$+10|0.314E+13| 3.14E+12"
(foo 3.14L120) => "*********|?????????|%%%%%%%%%|3.14L+120"
(foo 3.14L1200) => "*********|?????????|%%%%%%%%%|3.14L+1200"
(format nil "~10<foo~;bar~>") => "foo bar"
(format nil "~10:<foo~;bar~>") => " foo bar"
(format nil "~10<foobar~>") => " foobar"
(format nil "~10:<foobar~>") => " foobar"
(format nil "~10:@<foo~;bar~>") => " foo bar "
(format nil "~10@<foobar~>") => "foobar "
(format nil "~10:@<foobar~>") => " foobar "
(FORMAT NIL "Written to ~A." #P"foo.bin")
=> "Written to foo.bin."
The following X3J13 cleanup issue, not part of the specification, applies to this section:
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