# What does $R^+$ mean?

I'm not sure if it's statistics related but I came over this in my stats related computing assignment.

Does $R^+$ (looks like R to the power of plus) mean all positive real numbers? Does it include 0?

• google.com/search?q=%22Let+R%2B%22 – Glen_b Oct 9 '13 at 5:34
• To clarify (though the explicit answer can be found among in many of the links I get from my linked search above); usually it means positive reals rather than non-negative reals. – Glen_b Oct 9 '13 at 5:50