frac
The fractional part function.
Syntax

frac(x)

x
is a real number

Description
If x
is a real number, then frac(x)
is the fractional part of x
, that is, frac(x) = x − trunc(x)
. frac(x)
has the same sign as x
, a zero as the integral part, and the same fractional digits as x
.
Examples
frac(π)
0.14159265359
frac(e)
0.718281828459
frac(−π)
−0.14159265359
frac(−e)
−0.718281828459