Summary
This chapter explains how integer overflow occurs when values exceed an integer type’s representable range, causing wraparound or truncation without raising errors.

General domain of usage
numeric computations

We found out that assigning a value exceeding the **-2,147,483,648** to **2,147,483,647** range would not raise any <span style="color: red">error</span>. Instead it will cause an overflow.

**Overflow** occurs when a calculation produces a result that is too large to be represented by the data type used.

Note

For example, if you try to store a value larger than the maximum representable value for an integer type, an overflow will occur, and the result will wrap around or be truncated, leading to unexpected behavior in your program.

It can lead to critical bugs in your programs, so that's something to keep in mind. We will learn how to handle numbers that are too large in the next chapter.

#define CATCH_CONFIG_MAIN
#include <catch2/catch.hpp>

long sumViews(int platform1, int platform2);

TEST_CASE("Sum 100 + 200 should be 300", "[sumViews]") {
    long result = sumViews(100, 200);
    REQUIRE(result == 300); // Summing 100 + 200, expected result: 300
}

TEST_CASE("Sum 0 + 500 should be 500", "[sumViews]") {
    long result = sumViews(0, 500);
    REQUIRE(result == 500); // Summing 0 + 500, expected result: 500
}

TEST_CASE("Sum 1502365230 + 1262530350 should be 2764895580", "[sumViews]") {
    int p1 = 1502365230; 
    int p2 = 1262530350; 
    long result = sumViews(p1, p2);
    REQUIRE(result == 2764895580); // Summing 1502365230 + 1262530350, expected result: 2764895580
}

TEST_CASE("Sum -1000 + 500 should be -500", "[sumViews]") {
    long result = sumViews(-1000, 500);
    REQUIRE(result == -500); // Summing -1000 + 500, expected result: -500
}

TEST_CASE("Sum -200 + -300 should be -500", "[sumViews]") {
    long result = sumViews(-200, -300);
    REQUIRE(result == -500); // Summing -200 + -300, expected result: -500
}

TEST_CASE("Sum 0 + -150 should be -150", "[sumViews]") {
    long result = sumViews(0, -150);
    REQUIRE(result == -150); // Summing 0 + -150, expected result: -150
}

test.cpp

Developing a comprehensive understanding of data types is crucial when learning a programming language. This course offers an opportunity to delve deeper into data types in C++, gaining insights into how they are stored in memory. Additionally, the course covers the topic of type conversion.

short, int, long, float, double, etc. are all numerical data types. You will learn about all of them as well as the pitfalls they may conceal.

Challenge: Applications of Integer Types

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