Strings - R (String Literals)

Question 1

56) Strings are used for storing text.

Answer 1

Strings

Question 2

57) A string is surrounded by either single quotation marks, or double quotation marks: “hello” = ‘hello’.

Answer 2

Strings

Question 3

58) Assigning - A string to a variable is done with the variable followed by the <- operator and the string.

Answer 3

Strings

Question 4

59) Multiline Strings - You can assign a multiline string to a variable like this.

Answer 4

Strings

Question 5

60) Multiline Strings - However, note that R will add a “\n” at the end of each line break. This is called an escape character, and the n character indicates a new line.

Answer 5

Strings \n

Question 6

61) Multiline Strings - If you want the line breaks to be inserted at the same position as in the code, use the cat() function.

Answer 6

Strings cat()

Question 7

62) String Length - To find the number of characters in a string, use the nchar() function.

Answer 7

Strings nchar()

Question 8

63) Check a String - Use the grepl() function to check if a character or a sequence of characters are present in a string.

Answer 8

Strings grepl()

Question 9

64) Combine Two Strings - Use the paste() function to merge/concatenate two strings.

Answer 9

Strings paste()