What does this sign(~) mean?

Question

I am at the "More On Classes" step "Separate Files for Classes"
I follow the instructions in "Creating a new class" and instead of having this in MyClass.cpp:
#include "MyClass.h"

MyClass::MyClass()
{
//ctor
}
I have this:
#include "MyClass.h"

MyClass::MyClass()
{
//ctor
}

MyClass::~MyClass()
{
//dtor
}
I cannot figure out why and what does the sign (~) mean?
Sincerely

Answer 1

To distinguish btw constructor and destructor .

Answer 2

Give a read to destructors.

Answer 3

https://www.sololearn.com/discuss/1287618/?ref=app
https://www.sololearn.com/discuss/2150097/?ref=app