Numeric Limits and Overflow Behaviour
Query std::numeric_limits and understand signed and unsigned overflow rules.
Why Limits Matter
Every numeric type has a maximum and minimum representable value. Exceeding them can silently produce wrong results — or undefined behavior.
std::numeric_limits
Query the limits of any numeric type with the <limits> header. Compile-time constants — no runtime cost.
#include <limits>
std::cout << std::numeric_limits<int>::max() << "\n";
std::cout << std::numeric_limits<int>::min() << "\n";
std::cout << std::numeric_limits<double>::epsilon();All lessons in this course
- Integer vs Floating Point Types
- The cmath Header: pow sqrt abs round
- Random Numbers with the random Header
- Numeric Limits and Overflow Behaviour