paste("I ", "love ", "R.", sep="")
"I " %.% "love " %.% "R."
x = c(2,1,6,7,9)
paste("The length of vector (", paste(x , sep="", collapse =","), ") is ", length(x) , sep="")
"The length of vector (" %.% paste(x , sep="", collapse =",") %.% ") is " %.% length(x)
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