Niranjan, P.K.Kola, S.R.2026-02-062021Journal of Physics: Conference Series, 2021, Vol.1850, 1, p. -17426588https://doi.org/10.1088/1742-6596/1850/1/012014https://idr.nitk.ac.in/handle/123456789/30118A radio coloring of graphs is a modification of the frequency assignment problem. For a connected simple graph G, a mapping g of the vertices of G to the positive integers (colors) such that for every pair u and v of G, | g(u) - g(v)| is at least 1 + diam(G) - d(u, v), is called a radio coloring of G. The largest color used by g is called span of g, denoted by rn(g). The radio number, rn(G), is the least of { rn(g) : g is a radio coloring of G }. In this paper, for n 7 we obtain the radio number of Cartesian product of complete graph K n and cycle C m, K n C m, for n even and m odd, and for n odd and m 5 (mod 8). © Published under licence by IOP Publishing Ltd.