---
method: readline
summary: "Read the next line available."
synopsis: "File.prototype.readline()"
returns: "The next line or undefined if eof."
throws: "An [Irccd.SystemError](@baseurl@/api/module/Irccd/index.html#types) on failures."
---

## Remarks

<div class="alert alert-warning" role="alert">
**Warning**: this method is slow and its usage is discouraged on large files.
</div>