Exercise 1: Using a block return value in a method
Below is a method named bar_chart. We’re going to use “string multiplication” ("$" * 3 returns "$$$", for example) to make a primitive bar chart, using the return values from a block. Fill in the missing line of code in the middle of the each block to yield value to a block, and “multiply” the string "$" by the block return value. Then print the result.