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.

Assign  -  This is the verb which describes setting the value of a variable.

Looping Idioms  -  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.