- Remember that we declare a new variable by typing the let keyword and then assigning a name to the variable.
- A variable’s name is also known as an identifier.
- Names must begin with a letter, an underscore, or a dollar sign $ (best coding practice starts names with a lowercase letter).
- The letter of the first word in an identifier should always be lowercase, and the first word of any proceeding words should be uppercase.
// This practice is called camelcase. Ex:
// myVariable, placeHolder, camelCase
- Names are case sensitive. If you declare a variable with the identifier
myVariable, it cannot be accessed by saying
- Reserved words cannot be used as names.
- There are a few words used in JS that perform specific actions, such as the let keyword that tells the computer we are declaring a new variable
Reserved words example
let monthlyRent = 600;
let carNote$ = 300;
let home_address = "789 Super Fun Ln.";
let businessAddress2 = "326 City Rd.";
let lunchTotal$ = 11.49;
- notice the different types of data assigned
- Declare new variables and convert the following phrases to an appropriate variable name, using camelCasing and other naming conventions:
- annual income
- bills to be paid
- number of vacation days left
- week one
- week two
- week six