Variables allow programmers to store data and operate on that data in a systematic and structured way. They provide flexibility and efficiency in writing programs, as they enable us to reuse and modify values without repeating code. With variables, we can store different types of data, such as numbers, strings, booleans, and even more complex objects.
const keywords. Each keyword has its own scope and behavior, which we'll examine in detail in subsequent lectures.
When naming variables, it's important to choose descriptive and meaningful names that convey the purpose or content of the data being stored. Variable names should be written in camel case, starting with a lowercase letter and using uppercase letters to denote the beginning of each subsequent word.
To initialize a variable, we assign a value to it using the assignment operator (
=). This value can be a literal value (e.g.,
"Hello"), the result of an expression, or the value of another variable.
Once a variable is declared and initialized, its value can be modified by assigning a new value to it. This is particularly useful when dealing with changing data or performing calculations.
Variables are used by referencing their name in the program. They can be used in mathematical operations, as part of conditional statements, or to display output.
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