Data Types
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When declaring a variable, you need to specify what type of data we will store in it. There are data types for easy memory handling for every situation.
You can check the data type of certain expressions using the code below. Feel free to experiment with it.
main.cpp
123456789#include <iostream> #include <typeinfo> // Provides tools for type identification int main() { // `typeid().name()` gives you the type of expression // Replace `___` with a number, boolean (true/false), or character std::cout << "The data type is " << typeid(___).name() << std::endl; }
Numerical
These types are essential for storing numerical values and performing mathematical operations. They are divided into two main groups: integer types, which store whole numbers, and floating-point types, which store numbers with fractional parts.
integers.h
decimals.h
12// Examples of literal integers 5 100 30
Bool
The bool data type represents a logical value that can be either true or false. It is usually stored as a number, where zero means false and one means true. This simple type is essential for making decisions and controlling the flow of a program.
Char
The char data type is used to store individual characters, which can include letters, digits, punctuation marks, and special characters. These characters must be enclosed in single quotes ('), such as 'A', '9', or '!'.
Void
The void type represents the absence of any value. It means there is nothing stored, just an empty space where data would normally be. Despite being empty, it is very useful. It lets programmers create advanced features and handle complex tasks.
1. What does the int data type store?
2. What is the correct syntax for a char type?
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