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=={{header|RPL}}==
The 2 functions below take a word as an argument and return a boolean stating the presence or not of a 'file' (a 'variable' in RPL jargon) or a directory corresponding to the word.
« VARS SWAP POS
» '<span style="color:blue">ISHERE?</span>' STO
« PATH HOME
VARS ROT POS
SWAP EVAL <span style="color:grey">@ Back to initial directory</span>
» '<span style="color:blue">ISHOME?</span>' STO
=={{header|Ruby}}==
<code>File.exist?</code> only checks if a file exists; it can be a regular file, a directory, or something else. <code>File.file?</code> or <code>File.directory?</code> checks for a regular file or a directory. Ruby also allows <code>FileTest.file?</code> or <code>FileTest.directory?</code>.
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