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Macaulay2Doc :: isReal

isReal -- whether a number is real

Synopsis

Usage:

isReal x
Inputs:
- x, a number
Outputs:
- a Boolean value, whether x is real

Description

i1 : isReal 2.

o1 = true

i2 : isReal sqrt(-1)

o2 = false

Ways to use `isReal` :

"isReal(CC)"
"isReal(QQ)"
"isReal(RR)"
"isReal(RRi)"
"isReal(ZZ)"

For the programmer

The object isReal is a method function.