Simple (?) question about print statement

[Pelmen]

>From doc:

range( [start,] stop[, step])

This is a versatile function to create lists containing arithmetic
progressions. It is most often used in for loops. The arguments must be
plain integers. If the step argument is omitted, it defaults to 1. If
the start argument is omitted, it defaults to 0. The full form returns
a list of plain integers [start, start + step, start + 2 * step, ...].
If step is positive, the last element is the largest start + i * step
less than stop; if step is negative, the last element is the smallest
start + i * step greater than stop. step must not be zero (or else
ValueError is raised).