Originally thinking about trying it, this contact, found that R is very fun, people can not stop, I can not control myself, and then continue to learn it.
Ideone
In one of @dapeng's posts, he recommended an installation-free R environment: ideone
Trying this ideone to support a lot of programming languages is really a good thing. However, I tested R's drawing but he didn't generate it for me.
Dapeng's post also mentions Rweb. However, trying to print ("Hello World!") gave me a big Internal Server Error.
Tutorialspoint
When searching for R's learning resources, I found a very good teaching site, tutorialspoint. There are a lot of tutorials in various languages inside. Only you don't want to learn, there is no on the site!
R Tutorial & Execute R Online
Of course, the R tutorial is undoubtedly listed on this site, R Tutorial. In addition to this R Tutorial, the most exciting thing is that the website provides an online R environment.
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Just take a piece of code that generates a pie chart. The effect is as above. Is it convenient? However, this online R environment is not omnipotent, for example, you can not install the library itself, but this is normal, casually engage, then it is not going to be broken.
Online R IDE
Although the online R environment is already very powerful, it would be a bit more tricky to manage more complex projects. This site also provides a powerful Online R IDE.
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Other languages online environment
In addition to the R environment, tutorialspoint also provides an online programming environment for a variety of other languages, interested in playing it yourself.