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

See also

• trunc