We already saw that, within the body of a loop (which is a block of code), we can put other things that have their own blocks. If you look at the number-guessing program from chapter 1, you’ll see this:
The outer, light gray block is a while loop block, and the dark gray blocks are if and elif blocks within that while loop block.
You can also put a loop within another loop. These loops are called nested loops.
multiplier = 5 for i ...