[R] Is there string class in R?

[Zhongming Yang]

Hi,

I want to use R handle hundreds data file. So I want use some string
class to handle the names of data file. 

My idea procedure like:

for i in 1:20
{
   filename = "***" + i +".PRN"
   scan(filename)
   ....
}

Do anyone know how to do this?

Thanks,