cpp / beginner
Snippet
Constants with const: Immutable Values
The const keyword makes a variable immutable—its value cannot be changed after initialization. Constants must be initialized when declared. Attempting to modify a const variable causes a compilation error. Using const improves code clarity and prevents accidental modifications.
snippet.cpp
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#include <iostream>int main() {const int MAX_SCORE = 100;const double PI = 3.14159;MAX_SCORE = 200;return 0;}
Breakdown
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const int MAX_SCORE = 100;
Declares an integer constant that cannot be modified after initialization
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MAX_SCORE = 200;
This line would cause a compilation error because MAX_SCORE is const