cpp / beginner
Snippet
Variables and Primitive Data Types
C++ provides several primitive data types for storing different kinds of values. int stores whole numbers like 42. double stores decimal numbers like 3.14159. char stores single characters like 'A'. bool stores true/false values. Choosing the right type ensures efficient memory use and prevents bugs. Variables must be declared with a type before use.
snippet.cpp
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#include <iostream>int main() {int wholeNumber = 42;double pi = 3.14159;char grade = 'A';bool isActive = true;std::cout << "Number: " << wholeNumber << std::endl;std::cout << "Pi: " << pi << std::endl;std::cout << "Grade: " << grade << std::endl;std::cout << "Active: " << isActive << std::endl;return 0;}
Breakdown
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int wholeNumber = 42;
Integer type for whole numbers, typically 4 bytes
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double pi = 3.14159;
Double precision floating-point for decimal numbers
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char grade = 'A';
Character type for single letters, symbols, or digits
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bool isActive = true;
Boolean type that stores true (1) or false (0)
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<< operator
Stream insertion operator used with std::cout for output