How to see actual numbers in a hist on R? Just as an example I'm using iris data. I have a histogram, which is nice, but the distribution is weird, and I'd like to see what the bars represent:

Here's a histogram:



And I'd like to see the high/low that each bar represents. For instance, the first bar has a frequency of 34, but a width of something in the range of the lowest third of 0.0-0.5. 

Obviously there won't be a width of 0.0, so what is the width range? How can I show it on the histogram?
Hope this may help you

hist(iris$Petal.Width,labels=T)