Discussion – Lesson 2 - Dynamic memory management in C++

so new keyword dynamically allocated memory why is that a number 10 given to array ?
int* array = new int[10];

this means 10 items. how about number of items are not knowing?

Hi Manoj,

the length of a dynamically allocated array doesn't need to be passed as a constant value (e. g. value 10 or 15), it can be passed just as any normal integer variable (e. g. byte, short, int etc...), for example:

int len = 10;// the variable could be of any integer data type as long as the value fits in its range
int* array = new int[len];

This way you can create an array of any desired length you need it to be.

If you run into a situation where you need the array to be able to expand itself (e. g. when you're adding new items to a warehouse stock), there is a container called vector , but that's a little advanced topic.

If you have any other questions regarding this or similar topic, feel free to ask.