Subscript out of Range
If the subscript is out of range, it means that you tried to access an
index out of the array. If the array has 4 cells, accessing the fifth
cell is a subscript out of range.
This is the verb which describes setting the value of a variable.
An idiom in computer programming is a form of code that comes up frequently.
A looping idiom is a form which uses a loop construct. Loops are useful for
stepping sequentially through an array.