3. Data Types

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3. Data Types

In programming logic, data types are a fundamental concept. They determine the type of information a variable can store. In this chapter, we'll explore the most common data types in programming languages ​​and how they are used.

Integers

Integers are one of the most basic data types in programming. They are used to represent numbers without decimals. For example, if we want to count the number of people in a room, we'll use an integer, as we can't have a fraction of a person.

In many programming languages, integers are represented by the 'int' keyword. They can be positive or negative and have a size limit depending on the programming language. For example, in Java, an 'int' can have a value between -2,147,483,648 and 2,147,483,647.

Floating point numbers

Floating point numbers, often referred to as 'float', are used to represent numbers with decimals. They are useful when we need precision in our calculations. For example, if we wanted to calculate the average of a series of numbers, we would probably use a float for the result, as the average could be a decimal number.

Like integers, floats have a size limit. In Java, a float can have a value between 1.4E-45 and 3.4028235E38.

Characters and Strings

Characters are used to represent letters, numbers, and symbols. In many programming languages, they are represented by the 'char' keyword. A 'char' can store a single character, such as 'a', '1' or '$'.

Strings are used to represent text. They are essentially a string of characters. In many programming languages, strings are represented by the 'string' keyword. A string can store any amount of text, from a single letter to an entire book.

Booleans

Booleans are a data type that can have only two values: true or false. They are used to represent the truth or falsehood of a condition. For example, if we want to check if a person is of legal age, we'll use a boolean to store the result. In many programming languages, Booleans are represented by the keyword 'bool'.

Conclusion

Data types are a fundamental part of programming logic. They allow us to store and manipulate different types of information in our programs. By understanding how to use different types of data, we can write more efficient and effective code.

It is important to remember that different programming languages ​​may have different data types and size limits. Therefore, it's always a good idea to check the documentation for the programming language you're using to fully understand how to work with different data types.

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43.1. Data Types: Variables