## A cyclic group with finite order \$k\$ is isomorphic to group \$\mathbb{Z}/k\mathbb{Z}\$

If a cyclic group has finite cardinality $$k$$ how do I prove that it is Isomorphic to the group $$(\mathbb{Z}/k\mathbb{Z}, +)$$.

I can show that the two groups have the same order but not sure how to prove bijectivity.