Data Types
Programming is all about manipulating data. Data can represent values such as people's names, temperature, image dimensions, the amount of disk storage, and total likes on a discussion group post.
All the data in a program has a data type. The data types that you usually learn to use first in JavaScript are number, string, boolean, object, array, and function. The number, string, and Boolean data types represent a single value. Objects represent more complex data. Functions are for writing programs.
Some common JavaScript data types with their uses and descriptions are as follows:
- number: Any positive or negative value whole numbers, usually called integers and floating-point numbers, that can be used in mathematical operations. It is used in product prices, checkout totals, the number of likes on a post, the geometry value of Pi, and can be used as a random number.
- string: Any set of valid characters that cannot be, or are not intended to be...