📘 Lesson · Lesson 76

new and delete

Dynamic Memory in C++

💡 Note

In C++, new allocates memory on the heap and delete frees it — the modern replacement for malloc/free.

Example

C++

#include <iostream>
using namespace std;
int main() {
    int* p = new int(10);    // allocate
    cout << *p << "\n";       // 10
    delete p;                 // free single

    int* arr = new int[3];    // allocate array
    delete[] arr;             // free array
    return 0;
}

Output:
10

Summary

new allocates, delete frees a single object.
For arrays use new[] and delete[].

Dynamic Memory in C++

💡 Note

In C++, new allocates memory on the heap and delete frees it — the modern replacement for malloc/free.

Example

C++

#include <iostream>
using namespace std;
int main() {
    int* p = new int(10);    // allocate
    cout << *p << "\n";       // 10
    delete p;                 // free single

    int* arr = new int[3];    // allocate array
    delete[] arr;             // free array
    return 0;
}

Output:
10

सारांश

new allocates, delete frees a single object.
For arrays use new[] and delete[].

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