If else statements

Suppose that num is a single numeric value. Provide code that will add 1 to num if it is less than 0; subtract 1 from num if it is greater than 0; and leaves num unchanged if it is exactly 0.

please look at the below example :

dff <- data.frame(x=-5:7)
dff %>% mutate(var1=ifelse(x<0,x+1,ifelse(x>0,x-1,x)))

var1 is the new defined variable which you want ..

hope this clear .

Kind Regards

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