Constructors Theory Notes

Constructors

•  Without constructors, objects cannot be created.
• Same as class name
• Constructor is a function which has the same name as the class and has no return value, not even void
• use- to initialize the data members/instance variables  

• Types: Non-Parameterised

       Parameterised

• Constructors no return type, but functions have 

Default Constructor 

non-parameterised

initializes variables with default values 

works in absence of any user-defined constructor                             

Constructor Overloading

using multiple constructors in the same class with different number of arguments or type of arguments

Difference b/w Constructor and Function

• Constructor same name as class, but function has to have diff. name
• Constructor called automatically at time of object creation, function has to be called
• Constructor never returns a value, function does return or at least void