rows

rows(X)

X is a vector/matrix/table.

Return the number of rows in X. Please check related function: cols.

y=1 2 3;
rows(y);
// output
3
// a vector can be viewed as an n*1 matrix.

x=1..6$2:3;
X

rows X
// output
2

a=table(1..3 as x,`IBM`C`AAPL as y);
a

 rows a;
// output
3