set a variable equal to the count

how do I set a variable equal to the number of numbers in my array.

For example, if I have an array that contains 1981 numbers, and another array that contains 6229 numbers, how do I create a variable where k=1981 for the first array and k=6229 for the second and so on?

Answer 1

[Fangjun Jiang]

numel()

[Jordan Grapel]

Thank you. Worked like a charm.