Introduction to R: Exercises
3. Arithmetic operators. The following operators can be used to perform basic arithemtic operations in R:
+: addition-: subtraction*: multiplication/: division^: exponentiation
Complete the exercises below by applying the correct operator.
X <- 3
Y <- 6
# Multiply 3 by 4.
3___4
# Square the variable X.
___
# Divide Y by X.
___
# Raise Y to the (X-3) power.
Y^___
# Multiply 3 by 4.
3*4
# Square the variable X.
X^2
# Divide Y by X.
Y/X
# Raise Y to the (X-3) power.
Y^(X-3)
test_error()
test_output_contains("3*4", incorrect_msg="Recall that you can use the `*` operator to perform multiplication.")
test_output_contains("X^2", incorrect_msg="Recall that you can use the `^` operator to perform exponentiation.")
test_output_contains("Y/X", incorrect_msg="Recall that you can use the `/` operator to perform division.")
test_output_contains("Y^(X-3)", incorrect_msg="Recall that you can use the `^` operator to perform exponentiation.")
success_msg("Excellent work!")
Review the list of operators if you are unsure which to apply.
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