5 data types in javascript 1 javascript tutorial

javascript features several fundamental data types that are essential for building applications. the five primary data types include:

1. **undefined**: this type indicates a variable that has been declared but not assigned a value. it is a default state for uninitialized variables.

2. **null**: representing an intentional absence of any object value, null is often used to indicate that a variable should be empty or non-existent.

3. **boolean**: this type can hold only two values: true or false. booleans are commonly used in conditional statements to control the flow of logic in programs.

4. **number**: javascript uses a single type for all numeric values, which can be integers or floating-point numbers. it also includes special values like nan (not-a-number) and infinity.

5. **string**: strings represent sequences of characters and are used for storing and manipulating text. they can be defined using single, double, or backtick quotes.

understanding these data types is crucial for effective coding in javascript.
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