Script editor and console

Numbers in between [] in the console?

They refer to the index (position) of the value that is following them.

In the example above variable we generate a vector containing 20 values. In the console you see that each line is preceded by an integer in between square brackets. This integer indicates the position (also called index) of the first element of the line in the vector, e.g. the first element on the first line has index 1 hence [1] whereas the second line starts with the element in the 9th position of the vector hence [9].