ALen()
This function returns the number of elements, rows or columns in an array. For one-dimensional arrays, it returns the number of elements. For two-dimensional arrays, a parameter determines whether it returns elements, rows or columns. We often forget to include the parameter when asking for rows and end up with elements by accident. A better approach is to always pass 1 for the second parameter unless you specifically want the number of columns. With a one-d array, you still get the number of elements, but for a two-d array, you'll get rows, which is what we almost always want. Usage | nReturnValue = ALEN( ArrayName [, nElemRowOrCol ] ) |
Parameter | Value | Meaning |
ArrayName | Array Name | The array whose elements, rows or columns are to be counted. Can be either one- or two-dimensional. |
nElemRowOrCol | 0 or Omitted | Returns the number of elements in the array. |
1 | Returns the number of rows in a two-dimensional array. For a one-dimensional array, returns the number of elements. | |
2 | Returns the number of columns in a two-dimensional array. Returns 0 for a one-dimensional array. | |
nReturnValue | Numeric | The number of elements, rows or columns in ArrayName. |
Example | USE Employee COPY TO ARRAY aEmps FIELDS Last_Name, First_Name nCount = ALEN(aEmps,1) * check if an array is two-dimensional IF ALEN(MyArray, 2) = 0 * one-dimensional ELSE * two-dimensional ENDIF |
See Also | ACopy(), AElement(), Array Manipulation, ASubscript(), Dimension |
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Copyright © 2002 by Tamar E. Granor, Ted Roche, Doug Hennig, and Della Martin. All Rights Reserved.