# Meaning of a vertical bar

So I've encountered something I haven't seen before. Could someone tell me what the following means:

x | 5

• x divides 5. No remainder left Sep 23 '15 at 13:17
• means you can divide 5 by x without rest Sep 23 '15 at 13:17
• @math12. No. It is exactly the opposite. You can divide 5 by x without a remainder. Sep 23 '15 at 13:19
• corrected it, thanks Sep 23 '15 at 13:20

$a|b$ means that you can divide b by a without getting a nonzero remainder.
Alternatively: $b$ is a multiple of $a$.
It means $5\div x$ is a whole number.
The $$x | 5$$ expression would mean that any number $$x$$ would be a divisor of $$5$$ with no remainder. In other words, $$5$$ would be evenly divisible by $$x$$.