How to convert all pdf files to text (within a folder) with one command?

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http://askubuntu.com – I know that I can convert pdf files to text files one by one like this : $ pdftotext filename.pdf But is there a single command that would make that conversion without specifying separate file names so as to convert them all? I see here, on Wikipedia, that "Wildcards (*), for example $ pdftotext *pdf, for converting multiple files, cannot be used because pdftotext expects only one file name." (HowTos)