what is mean by const after the parameter?

[mike9407]

int getAge()const{return Age;}

[Moschops]

It is a promise that this class function will not change any class member variables, EXCEPT for any class member variables that are marked with the qualifier mutable in the class definition.

[mike9407]

i dont get what u mean by

[Peter87]

const is useful because it prevents you from modifying things that are not supposed to be modified by mistake.

When you call getAge() you can be sure that it will not modify the object. If you tried to modify the Age (assuming it's a member variable) inside the function it would give you an error.

int getAge() const
{
	Age = 8; // error
	return Age;
}

[48T7M4Gy]

https://msdn.microsoft.com/en-us/library/07x6b05d.aspx

int getAge()const
{
   return Age;
} 

As an example getAge() could be a method/ member function related to an object which is an instance of a Person class.

const guarantees that getAge() is read only. i.e. it can only return the Person object's age and cannot alter any of the Person object's attributes/properties.