BarChart[{$b_1$, $b_2$ ...}] Drawing options include -
Charting:
BarChart specific:
A bar chart of a list of heights:
BarChart[{1, 4, 2}]
BarChart[{1, 4, 2}, ChartStyle -> {Red, Green, Blue}]
BarChart[{{1, 2, 3}, {2, 3, 4}}]
Chart several datasets with categorical labels:
BarChart[{{1, 2, 3}, {2, 3, 4}}, ChartLabels -> {"a", "b", "c"}]
BarChart[{{1, 5}, {3, 4}}, ChartStyle -> {{EdgeForm[Thin], White}, {EdgeForm[Thick], White}}]