What is dynamic memory andwhat is delete pointer?

Answer 1

dynamic memory means the memory you use while running the program...

for example:

int a=new int

//it means you have allocated a memory space for a... but not actually... rather virtually...it's like RAM

then when you type

delete a;

// all the contents of a are erased and memory gets freed....

these help to reduce the usage and size of file... by not making a fuller bulky