by,step

Usage

s by n
step s

Signatures

by:	(%,Z) $\to$ %
step:	% $\to$ Z

Parameter	Type	Description
s	%	a segment
n	Z	a step

Returns

s by n changes s to become the segment consisting of every ${n}^{{\rm th}}$ integer in its range, i.e.the integers $a, a + n, a + 2n, \dots$ that are within the range $[a,b]$ or $[a, +\infty)$ of s, while step(s) returns n such that s is the segment consisting of every ${n}^{{\rm th}}$ integer in its range.

Remarks

The function s by n does not create a new segment but side-effects s, whose former step is lost.