Using Vector for Dynamic Arrays

Snippet

Using Vector for Dynamic Arrays

std::vector is a dynamic array from the standard library that grows automatically. Use push_back to add elements and size() to get the element count. Range-based for loops iterate through vectors easily.

snippet.cpp
cpp
#include <vector>
std::vector<int> numbers;
numbers.push_back(10);
numbers.push_back(20);
numbers.push_back(30);
 
for (int num : numbers) {
    std::cout << num << " ";
}
std::cout << "Size: " << numbers.size();

Breakdown

std::vector<int> numbers;

Creates an empty vector that holds integers

push_back(10);

Adds the value 10 to the end of the vector

for (int num : numbers)

Range-based loop iterates over each element

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Using Vector for Dynamic Arrays

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