R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
Copyright (C) 2013 The R Foundation for Statistical Computing
Platform: i686-pc-linux-gnu (32-bit)

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> x <- c(5,6,6,6,6,6,7,7,7,7,7,8,8,8,8,8,9,9,9,9,10,10,10,11)
> par1 = '10'
> xlab = 'Survey Score'
> main = 'Non-smoker's rating for hot curry'
Error: unexpected symbol in "main = 'Non-smoker's"
Execution halted