# Is there a shorthand notation to $frac(x) = x - \lfloor x \rfloor$?

In old Hewlet Packard calculators, it was common to have an int and a frac function, which were giving the integer and the fraction part of a number.

Nowadays, the floor function is quite common and noted $$\lfloor x \rfloor$$ but to get fraction part, you usually need to compute it "by hand" by explicitly writing something like x - floor(x). I wondered if there existed some mathematical short hand notation for $$frac(x) = x - \lfloor x \rfloor$$.

Thank you.

• Most common is $\{x\}$. – lulu Oct 25 '19 at 21:27
• Thank you but why wouldn't you post this as a reply (which I could accept as the reply) ? – Camion Oct 25 '19 at 21:28

The standard notation for the fractional part of $$x$$ is $$\{x\}$$.