Final answer:
To include an apostrophe in a string literal, use single quotation marks for a quotation within a quotation, place an apostrophe with 's' for singular possession, after 's' for plural possession, or to indicate omitted letters in contractions.
Step-by-step explanation:
To include an apostrophe within a string literal, you can utilize different methods depending on the situation. For instance, if you're dealing with a quotation within a quotation, you place single quotation marks around the inner quotation, while using double quotation marks for the entire quotation. For example, if someone said that their favorite dessert is ice cream, you would write: "Jack said, 'My favorite dessert is ice cream.'"
When indicating possession, an apostrophe is used with an -s for singular nouns or indefinite pronouns, as in "Jack's brother" or "everyone's favorite." In cases where the noun is plural and ends in an -s, the apostrophe is placed after the final -s, like in "households' incomes." Similarly, contractions are formed using an apostrophe to show where letters have been omitted, such as in "don't" (do not) or "won't" (will not).