Select

select is a jump that jumps nowhere. Its condition is the same, and instead of jumping it puts one of two values into a variable: the first if the condition holds, the second if not.

The line reads as words, and in the game that is how it is written: total = if copper >= 100 then 1 else 0.

The group is small: the instruction does exactly one thing, and the whole conversation is about when it is appropriate. Not always: if the choice is between one and zero, the comparison in op gives the answer by itself, and select there is redundant.

Lessons

1. Choosing a value without a branchA branch for the sake of one value is unnecessary — but select is not always needed either: a comparison already has an answer

What you need first

«Condition and branching» — that is where the conditions and their labels in the blocks are covered, and select takes exactly the same ones.