嗨，我是一个新的 R 学习者。在编辑器上写了下面两个相同的代码，第二个运行正常，而第一个有错误..第一个有什么问题

Question

1st One

Not run there is an error

repeat{
sc=scan(nmax=1)
if (sc>9) {break} else{
b=switch(sc,"ONE","TWO","THREE","FOUR","FIVE","SIX","SEVEN","EIGHT","NINE")
cat(“\n The Number Entered is “, sc ,” In Alpha it is  “, b,”\n”) } }

the Error is Error: unexpected input in: "b=switch(sc,"ONE","TWO","THREE","FOUR","FIVE","SIX","SEVEN","EIGHT","NINE") cat(“"

2nd One This one runs ok

repeat{
sc=scan(nmax=1)
if (sc>9) {break} else{
b=switch(sc,"ONE","TWO","THREE","FOUR","FIVE","SIX","SEVEN","EIGHT","NINE")
cat("\n The Entered Number is ", sc ," In Alpha it is ", b,"\n") } }

1: 4 Read 1 item The Entered Number is 4 In Alpha it is FOUR

Answer 1

“ is not allowed in R as a parentheses.

In the first piece of code you are using “ instead of ".

“ may appear if you copy your code into MS Word first and then into.R file. To securely copy the code pls use Notepad (Notepad++ or IDE) so it preserves " symbol as is and does not transform it into “.