a <- 1
print a
Error in parse(text = x, srcfile = src): <text>:2:7: unexpected symbol
1: a <- 1
2: print a
         ^

a <- 1

print(a)
Error in print(a): object 'a' not found
a <- "Hello world"
print(a)
[1] "Hello world"
a <- "Hello world"
print(a)
[1] "Hello world"
b <- [1, 3, 2, 5, 4, 1.5, 2.3]
Error in parse(text = x, srcfile = src): <text>:1:6: unexpected '['
1: b <- [
         ^
b <- seq 0:6
mean(b)
Error in parse(text = x, srcfile = src): <text>:1:10: unexpected numeric constant
1: b <- seq 0
             ^

b <- 0:6
mean(b)
3
print(a+b)
Error in a + b: non-numeric argument to binary operator
qplot(b)
Error in eval(expr, envir, enclos): could not find function "qplot"