What is 'eps' in evalutation?

[richard0326]

eps           = 1e-5

...

precision = 1.0*correct/(proposals+eps)
recall = 1.0*correct/(total+eps)
fscore = 2.0*precision*recall/(precision+recall+eps)

I'm working on understanding the evaluation system. And having problem in understanding eps... Why do you add '1e-5' value. And named it eps??

[andy-yun]

@richard0326 eps stands for epsilon and has a role to avoid divide-by-zero exception.

[richard0326]

thank you