Knitting Stitches: K1, P1 Ribbing

Flat
Worked over an odd number of sts

Row 1: *K1, p1; rep from *, end k1.
Row 2: *P1, k1; rep from *, end p1.
Repeat rows 1-2

In the round
Worked over an even number of sts

All rounds: *K1, p1; rep from *.