5.3 Iterative Statements

while assertion block end

Repeats block while assertion is true.

for i = a to b { step c } block end

Repeats block while incrementing number i by c (default: 1), from a to b. Numbers b and c are evaluated at each step. Iteration ends as soon as i is greater than or smaller than b, depending on the sign of c.

for P in s block end

Repeats block while point P runs through set s.

Example:

O = point(3,2)
H = hexagon(O, 3, 0°)
draw (H)

for P in H
  draw O.P dotted
end