realPart -- real part

• Usage:

  realPart z

• Inputs:
  • z, an integer, rational, real or complex number, or a real or complex interval
• Outputs:
  • the real part of the complex number z or an interval containing the real parts of real or complex interval z

i1 : realPart(3/4)

     3
o1 = -
     4

o1 : QQ

i2 : realPart(1.5+2*ii)

o2 = 1.5

o2 : RR (of precision 53)

i3 : realPart(interval(1+2*ii,3+4*ii))

o3 = [1,3]

o3 : RRi (of precision 53)