abs -- absolute value function

Synopsis

• Usage:

  abs x

  abs I

• Inputs:
  • x, a number
  • I, a real interval
• Outputs:
  • the absolute value of x
  • a real interval, an interval containing the absolute values of all the point of I

Description

i1 : abs(-pi)

o1 = 3.14159265358979

o1 : RR (of precision 53)

i2 : abs(1+ii)

o2 = 1.4142135623731

o2 : RR (of precision 53)