Lesson | Coding Basics

1. True.
2. The division sign is evaluated first.
3. The answer is C. The code 2+2+2 gets evaluated before it is stored in the object.
4a. The value is 1. The code evaluates to 9-8
4b. table(ebola_data$district)
5a. You cannot add two character strings. Adding only works for numbers.
5b. my_1st_name is typed with the number 1 initially, but in the paste() command, it is typed with the letter “I”.
6. The third line is the only line with a valid object name: top_20_rows
7. The last line, head(6,women), is invalid because the arguments are in the wrong order and they are not named.
8. The third code chunk has a problem. It attempts to find the square root of a character, which is impossible.
9. The first line, A, is the correct interpretation.
10. The first code chunk is the recommended way to install and load the package {janitor}