13.14.10 The length of a vector: abs
The abs command finds the absolute value of a number or the
length of a vector (see also Section 5.16.2 and
Section 5.10.4).
- abs takes one argument:
v, a number or a vector defined by two points.
- abs(v) returns the absolute value of v if v is
a complex number or the length of v if v is a vector.
Example
Input:
abs(1+i)
or:
abs(point(1+2*i) - point(i))
Output: