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Check that file exists: Difference between revisions
GP and PARI
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{Show {Path.exists "/docs"}}
{Show {Path.exists "/input.txt"}}</lang>
{{incomplete|Needs to check directories and the filesystem root.}}
<lang parigp>trap(,"does not exist",read("input.txt");"exists")</lang>
A better version would use <code>externstr</code>.
Under PARI it would typically be more convenient to use [[#C|C]] methods.
=={{header|Pascal}}==
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{{omit from|HTML}}
▲{{omit from|PARI/GP}}
{{omit from|TI-83 BASIC|Does not have a filesystem, just namespaced variables.}}
{{omit from|TI-89 BASIC|Does not have a filesystem, just namespaced variables.}}
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