Find the cardinal number for the given set. \[ A=\{13,15,17,19\} \] The cardinal number is (Type a whole number.)

Step 1 ：The cardinal number of a set is simply the number of elements in the set. In this case, the set A contains the elements 13, 15, 17, and 19. So, we just need to count these elements.

Step 2 ：A = {17, 19, 13, 15}

Step 3 ：The cardinal number is 4

Step 4 ：Final Answer: The cardinal number for the given set is \(\boxed{4}\)