Histogram, also called histogram, is a kind of statistical report chart, which is represented by a series of vertical bars with different heights. Suppose we have a pile of coins: first classify the coins, and then count the number of each coin separately. When a statistical result is represented by a chart, it becomes a histogram.

The horizontal axis below shows the denomination of coins (type? Yes? Coins), vertically indicating the number of coins ($ NUMBER? Yes? Coins).