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Article contents:[[tags: manual]] [[toc:]] == Module (chicken format) This module provides procedures for formatting output to ports and strings. === The printf family of procedures ==== printf ==== fprintf ==== sprintf <procedure>(fprintf PORT FORMATSTRING [ARG...])</procedure><br> <procedure>(printf FORMATSTRING [ARG...])</procedure><br> <procedure>(sprintf FORMATSTRING [ARG...])</procedure> Simple formatted output to a given port ({{fprintf}}), the value of {{(current-output-port)}} ({{printf}}), or a string ({{sprintf}}). The {{FORMATSTRING}} can contain any sequence of characters. There must be at least as many {{ARG}} arguments given as there are format directives that require an argument in {{FORMATSTRING}}. Extra {{ARG}} arguments are ignored. The character `~' prefixes special formatting directives: <table> <tr><td>~%</td><td> write newline character </td></tr><tr><td> ~N</td><td> the same as {{~%}} </td></tr><tr><td> ~S</td><td> write the next argument </td></tr><tr><td> ~A</td><td> display the next argument </td></tr><tr><td> ~\n</td><td> skip all whitespace in the format-string until the next non-whitespace character </td></tr><tr><td> ~B</td><td> write the next argument as a binary number </td></tr><tr><td> ~O</td><td> write the next argument as an octal number </td></tr><tr><td> ~X</td><td> write the next argument as a hexadecimal number </td></tr><tr><td> ~C</td><td> write the next argument as a character </td></tr><tr><td> ~~</td><td> display `~' </td></tr><tr><td> ~!</td><td> flush all pending output </td></tr><tr><td> ~?</td><td> invoke formatted output routine recursively with the next two arguments as format-string and list of parameters </td></tr></table> === format <procedure>(format [DESTINATION] FORMATSTRING [ARG...])</procedure> The parameters {{FORMATSTRING}} and {{ARG...}} are as for {{printf}}. The optional {{DESTINATION}}, when supplied, performs: ; {{#f}} : {{sprintf}} ; {{#t}} : {{printf}} ; {{output-port}} : {{fprintf}} ; : {{sprintf}} --- Previous: [[Module (chicken foreign)]] Next: [[Module (chicken gc)]] Description of your changes:

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