ERROR in ruby gem

Ruby
1

I type “gem --help” in the command, there appear the “Bad Command”. Now
i cannot install other gem into my computer, any1 can help me?

2

Cool W. wrote:

I type “gem --help” in the command, there appear the “Bad Command”. Now
i cannot install other gem into my computer, any1 can help me?

make sure gem’s in your path. Are you on windows or linux?
Try reinstalling gems.